Jaime Puértolas

Jaime Puértolas
Universidad de La Laguna | ULL · Department of Botany and Plant Ecology and Physiology

PhD

About

72
Publications
18,458
Reads
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1,877
Citations
Introduction
Additional affiliations
May 2011 - present
Lancaster University
Position
  • Research Associate
February 2008 - October 2010
Centro de Estudios Ambientales del Mediterráneo
Position
  • Senior Researcher
October 2004 - January 2008
Ministerio de Medio Ambiente, Spain
Position
  • Research contractor
Education
October 1990 - December 1997

Publications

Publications (72)
Article
Full-text available
Purpose Partial rootzone drying (PRD) typically alternates the dry and irrigated parts of the rootzone, but how plant physiology and soil evaporation respond to this alternation are poorly understood. Methods Dwarf tomatoes were grown in small split pots comprising two 250 cm³ compartments and fully irrigated (WW: 100% ETc) or subjected to three d...
Article
Background and Aims: Previous laboratory studies have suggested selection for root hair traits in future crop breeding to improve resource use efficiency and stress tolerance. However, data on the interplay between root hairs and open-field systems, under contrasting soils and climate conditions, are limited. As such, this study aims to experimenta...
Article
To investigate the importance of shoot-to-root communication in modulating tissue phytohormone balance as the soil dries, root and leaf hormonal profiles were determined in soybean plants (Glycine max L. Merr. cv. Siverka) exposed to factorial girdling (achieved surgically on Day 0 by excising the phloem with a sharp razor blade thereby disrupting...
Article
Full-text available
Plastic tree shelters are commonly used in plantations under Mediterranean climates to protect against herbivory and enhance outplanting performance. However, effects on outplanting performance cannot be generalized due to the complexity of plant responses to microenvironmental conditions within the tube wall. The interactions between the light tra...
Article
Full-text available
Seedling planting plays a key role in active forest restoration and regeneration of managed stands. Plant attributes at outplanting can determine tree seedling survival and consequently early success of forest plantations. While many studies show that large seedlings of the same age within a species have higher survival than small ones, others repo...
Article
Background and aims: Previous laboratory studies have suggested selection for root hair traits in future crop breeding to improve resource use efficiency and stress tolerance. However, data on the interplay between root hairs and open-field systems, under contrasting soils and climate conditions, are limited. As such, this study aims to experiment...
Article
Many studies ask how aluminum (Al) reduces the root growth, but as Al is mostly retained in the root system, physiological explanations for the also expected Al-induced decrease in stomatal conductance (gs) are unclear, mainly in well-watered conditions. We exposed tomato plants (Solanum lycopersicum) to 0, 25, 50 and 100 μM Al in nutrient solution...
Article
Physiological effects of irrigation frequency, at the same irrigation volume, have received little attention but might determine crop yield and water use efficiency. Potted plants of two species, tomato and basil, received two irrigation treatments that both supplied the same irrigation volume (75% of that received by a well-watered treatment - WW)...
Article
Soil drying increases endogenous ABA and ACC concentrations in planta, but how these compounds interact to regulate stomatal responses to soil drying and re-watering is still unclear. To determine the temporal dynamics and physiological significance of root, xylem and leaf ABA and ACC concentrations in response to deficit irrigation (DI) or partial...
Article
Soil moisture heterogeneity in the root-zone is common during both the establishment of tree seedlings and in experiments aiming to impose semi-constant soil moisture deficits, but its effects on regulating plant water use compared to homogenous soil drying are not well known in trees. Pronounced vertical soil moisture heterogeneity was imposed on...
Article
Full-text available
Background: Characterization of the dynamic response of plant transpiration to decreasing soil water content in a reproducible way is required for the correct phenotyping of traits related to water saving strategies. Nowadays, an increasing number of automated high throughput platforms are available, but their development requires a great economic...
Article
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The Mediterranean basin is especially sensitive to the adverse outcomes of climate change and especially to variations in rainfall patterns and the incidence of extremely high temperatures. These two concurring adverse environmental conditions will surely have a detrimental effect on crop performance and productivity that will be particularly sever...
Article
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Statistical meta-analysis is a powerful and useful tool to quantitatively synthesize the information conveyed in published studies on a particular topic. It allows identifying and quantifying overall patterns and exploring causes of variation. The inclusion of published works in meta-analyses requires, however, a minimum quality standard of the rep...
Article
Full-text available
Tree shelters in Mediterranean environments have a two-sided effect. They not only protect seedlings from browsing but also ameliorate microclimatic conditions, improving post-planting survival and growth. However, the ecophysiological basis of these effects are poorly understood. A factorial experiment combining light transmissivity and shelter ty...
Article
To understand the impact of shoot-to-root ABA transport on water potential of, and xylem ABA concentration in, different plant tissues during soil drying, soybean (Glycine max cv. Siverka) plants were subjected to drought and girdling in a factorial experiment. Girdling was achieved by surgically excising the phloem tissue from just above the cotyl...
Article
Full-text available
Plant roots sense drying soil and send long-distance signals(such as plant hormones) to the shoot to limit water loss (by closing the stomata and restricting leaf growth) and increase crop water use efficiency (yield produced per unit of water applied or transpired). These signals can be modified by altering irrigation volume(how much water), frequ...
Article
Limiting agricultural water usage will be a critical issue in the 21st century due to increased competition for scant resources. One possible solution to more efficiently use available water is to apply deficit irrigation (less water than full crop evapotranspiration). The benefits of deficit irrigation under certain circumstances are well document...
Article
Full-text available
Pot-based phenotyping of drought response sometimes maintains suboptimal soil water content by applying high-frequency deficit irrigation (HFDI). We examined the effect of this treatment on water and abscisic acid (ABA) relations of two species (Helianthus annuus and Populus nigra). Suboptimal soil water content was maintained by frequent irrigatio...
Conference Paper
Full-text available
Introduction: Advances on plant quality research require synthesize current knowledge and guide new research and practical applications. Abundant literature on the predictive ability of seedling functional attributes on post-planting performance has been produced over the last 70 years. However, the sometimes apparently contradictory results observ...
Conference Paper
Full-text available
Introduction: Plant morphology can drive the survival of outplanted seedlings in forest plantations. Particularly, plant shoot size is widely used to discriminate low quality seedlings. No clear consensus exists, however, whether increasing shoot size enhances outplanting survival potential, and what factors may affect the relationship between fiel...
Article
Partial root-zone drying (PRD) is predicted to increase ABA concentration in the xylem sap ([X-ABA]) without changing leaf water status, thus partially closing the stomata which may enhance plant water use efficiency. Predicting ([X-ABA]) from soil moisture and root distribution data are essential to optimize the application of this technique. Bean...
Article
p> Aim of the study: We studied the influence of nursery fertilization and post-planting light environment on the growth and survival of out-planted two-year-old yew ( Taxus baccata ) seedlings. Area of study: Post-planting performance was assessed at two sites in the Valsain Forest (Central Mountain Range, Segovia, Spain). Materials and Methods:...
Article
Full-text available
Key message Seedling survival in Pinus pinea is controlled by both water status and photosynthetic performance. Optimal regeneration niche for the species is found at mid-shaded sites. Abstract Summer survival has been identified as the main bottleneck preventing natural regeneration in Mediterranean forests, although the physiological processes re...
Article
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Success of Mediterranean dry areas restoration with oaks is a challenging goal. Testing eco-techniques that mimic beneficial effects of natural structures and ameliorate stress contributes to positive solutions to overcoming establishment barriers. We ran a factorial experiment in a dry area, testing two levels of solid wall transmission of tube sh...
Article
Full-text available
Soil drying and re-wetting (DRW) occurs at varying frequencies and intensities during crop production, and is deliberately used in water-saving irrigation techniques that aim to enhance crop water use efficiency. Soil drying not only limits root water uptake which can (but not always) perturb shoot water status, but also alters root synthesis of ph...
Article
Full-text available
Patterns of root abscisic acid (ABA) accumulation ([ABA]root), root water potential (Ψroot), and root water uptake (RWU), and their impact on xylem sap ABA concentration ([X-ABA]) were measured under vertical partial root-zone drying (VPRD, upper compartment dry, lower compartment wet) and horizontal partial root-zone drying (HPRD, two lateral comp...
Article
Context Tube shelters have been shown to enhance field performance of several Mediterranean species, but responses of newly planted seedlings to the microenvironment induced by shelter walls with different light transmissivity are still poorly documented. Aims We studied effects of a range of shelters with varying light transmissivity on post-pl...
Article
To test the hypothesis that root growth at depth is a key trait explaining some genotypic differences in drought tolerance in potato (Solanum tuberosum L.), two varieties (Horizon and Maris Piper) differing in drought tolerance were subjected to different irrigation regimes in pots in a glasshouse and in the field under a polytunnel. In the glassho...
Article
Full-text available
The planting environment of Mediterranean areas is highly challenging as summer drought and winter frost jeopardize survival, and soil infertility limits establishment success. We review the potential for seedling nutrient loading to alleviate these post-planting stresses. A growing body of evidence indicates that nitrogen (N) rich seedlings have i...
Article
To determine how root to shoot abscisic (ABA) acid signalling is regulated by vertical soil moisture gradients, root ABA concentration ( [ABA](root) ), the fraction of root water uptake from, and root water potential of different parts of the root-zone, along with bulk root water potential, were measured to test various predictive models of root xy...
Chapter
Full-text available
Resumen La reforestación es uno de los métodos más ampliamente utilizados para la recuperación de los ecosistemas degradados. En ambientes mediterráneos, las limitaciones impuestas por el clima y, en algunos casos, la severidad de los procesos de degradación hacen que los resultados de las reforestaciones sean pobres. Por otro lado, el seguimiento...
Article
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Increasing plant size has been considered a way to improve survival and growth of planted containerized stock under dry conditions. Additionally, deep planting provides advantages to seedlings in dry areas because roots are placed deeper into the soil where there is likely more water available. In this study, we tested the effect of Zizyphus lotus...
Article
Seedling quality and nursery practices have been studied extensively for Mediterranean pine species in recent years. However, the cost–benefit relationship of producing different planting stock-types has not been addressed. We cultured eleven different stock-types of Pinus halepensis Mill. and Pinus pinea L. by combining different container capacit...
Article
Reduction in size and tissue nutrient concentration is widely considered to increase seedling drought resistance in dry and oligotrophic plantation sites. However, much evidence indicates that increase in size and tissue nutrient concentration improves seedling survival in Mediterranean forest plantations. This suggests that the ecophysiological pr...
Article
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Seasonal courses of chlorophyll a fluorescence, gas exchange parameters and water status, joined to environmental variables, were measured in four age classes of stone pine (Pinus pinea L.) natural regeneration, selected within a natural light gradient in order to cover the whole range of incident light detected within a stone pine regular stand th...
Article
Tube shelters were designed to protect against browsing, but they improve seedling survival in Mediterranean dry climates. Mechanisms for this response, however, are not fully understood and this knowledge can be useful to help design optimal tube shelters for Mediterranean species and climates. Our objective in this study was to determine if the p...
Article
1. Competitive and facilitative interactions shape plant communities. Whereas a number of studies have addressed competition and direct facilitation among plants in dry ecosystems, indirect facilitation has received little attention. 2. We investigated the relative importance of direct and indirect facilitation by the nurse plant Retama sphaerocarp...
Article
In Mediterranean climates, seedlings are frequently shaded in the nursery to avoid heat damage and save water. However, the impact of this shading on the seedling quality and transplanting performance of Mediterranean species is not well known. We studied the effect of nursery shading on pre-planting features and post-planting performance of two Me...
Article
Full-text available
The interactive effects of shade and drought on different morphological and physiological traits were addressed on Quercus suber L. seedlings. In our experiment, limited light treatment (1 per cent) represented the main factor constraining cork oak seedlings growth. Maximal photochemical efficiency (Fv/Fm) with light ≥15 per cent exhibited a midday...
Article
Full-text available
We tested the hypothesis that fertilized containerized Pinus canariensis seedlings increases survival when planted in semiarid sites through the improvement of their physiological status during the establishment phase by an increment in root growth. Seedlings were cultured under two different regimes: traditional (in non-fertilized natural soil) an...
Chapter
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Ecological restoration represents an important tool for combating land degradation and increasing ecosystem resistance and resilience to disturbance, thus favoring the recovery of functions and services. Degraded drylands constitute very harsh conditions for the natural regeneration and rangeland restoration of the ecosystems. Scarcity of rainfall...
Article
Full-text available
In Mediterranean climates, seedlings are frequently shaded in the nursery to avoid heat damage and save water. However, the impact of this shading on the seedling quality and transplanting performance of Mediterranean species is not well known. We studied the effect of nursery shading on pre-planting features and post-planting performance of two Me...
Article
Full-text available
Entre los días 21 y 23 de noviembre de 2007 tuvo lugar la I Reunión del Grupo de Trabajo de Repoblaciones Forestales de la Sociedad Española de Ciencias Forestales (SECF) y el grupo de trabajo de Restauración Ecológica de la Asociación Española de Ecología Terrestre, y IV Reunión del Grupo de Trabajo de Repoblaciones Forestales de la SECF en las in...
Article
Full-text available
• The combined effect of water stress and light on seedlings of forest species is a key factor to determine the best silvicultural and afforestation practices in the Mediterranean area. • The aims of this work was (1) to determine the optimal light level for the early development of cork oak seedlings under mild water stress and (2) to test if the...
Article
Full-text available
The current ongoing increase in the atmospheric CO2 concentration is an unquestionable fact. Thus, plants are bound to live in a more enriched CO2 world in a not far-off future. In this new framework, regeneration of forest tree species may be modified as a consequence of the change in the current patterns of seedling response to other environmenta...
Article
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We studied the interaction of light and water on water-use efficiency in cork oak (Quercus suberL.) seedlings. One-year-old cork oak seedlings were grown in pots in a factorial experiment with four light treatments (68, 50, 15 and 5% of full sunlight) and two irrigation regimes: well watered (WW) and moderate drought stress (WS). Leaf predawn water...
Article
Water relations were studied in Norway spruce [Picea abies (L.) Karst.] trees grown at ambient (AC, 350 μmol mol−1) and elevated (EC, 700 μmol mol−1) CO2 concentrations under temperate water stress. The results suggested that both crown position and variability in atmospheric CO2 concentration are responsible for different patterns of crown water r...
Article
To test whether the impact of an enriched-CO2 environment on the growth and biomass allocation of first-season Quercus suber L. seedlings can modify the drought response under shade or sun conditions, seedlings were grown in pots at two CO2 concentrations × two watering regimes × two irradiances. Compared to CO2, light and water treatment had great...
Article
Full-text available
The objective of this study was to assess the effect of N fertilization in the nursery on frost and water stress resistance of seedlings in Mediterranean forest species. We reviewed the data of six independent fertilization experiments that were performed between 1997 and 2003 in six Mediterranean forest species: three oaks (Quercus suberL.,Q. ilex...
Article
Summary In a 14-week study, 1-year-old Aleppo pine seedlings were grown in two growth chambers. Seedlings were artifi cially hardened by decreasing photoperiod and temperature. In each chamber half of the seedlings were fertilized with nitrogen (8.4 mg seedling - 1 ). In order to determine the relative importance of the hardening environment versus...
Article
Full-text available
The interactive effects of light and drought on water relations and soluble sugars were addressed on Quercus suber L. seedlings grown under the combination of four irradiances and two soil water contents. Leaf water potentials at predawn and midday were lower for water stressed seedlings, independently of light environment. Osmotic potentials at fu...
Article
Diurnal courses of net CO2 assimilation, non-assimilatory processes, electron transport rate, photosystem (PS) II photochemical efficiency, and pigment composition were investigated during summer days for sun exposed needles of Norway spruce trees grown under ambient (AC) and/or elevated (EC; 700 μmol (CO2) mol−1) atmospheric carbon dioxide concent...
Article
Seedling size and nutrient concentration of nine Aleppo pine (Pinus halepensis Mill.) seedling sets, which differed in nursery fertilization, were measured before being planted out. Height and survival were monitored for 3 years after planting. Transplant stress indexes (TSI), defined as the relationships between initial height and growth were anal...