Diego Batlla

Diego Batlla
Universidad de Buenos Aires | UBA · Faculty of Agronomy

Dr in Agronomy

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56
Publications
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1,199
Citations

Publications

Publications (56)
Article
Thermal and hydrotime requirements for seed germination can vary with the species, environment in which the seeds developed and/or seed mass. We investigated seed germination responses to temperature and water potential of Aspidosperma quebracho-blanco, Bulnesia retama, Parasenegalia visco, Parkinsonia praecox, and Tecoma stans, all of which are na...
Article
Seed dormancy is a common attribute of many weed species in temperate habitats that controls the seasonality of weed emergence from soil seedbanks. For some weed species, it is not enough to reduce seed dormancy, as germination can only proceed after exposure to dormancy termination factors (i.e. light and alternating temperatures). Sensitivity to...
Chapter
The dynamics of weed seedbanks result from a complex interaction among seed attributes (i.e. morphology, physiology, and chemical composition), the surrounding biota (i.e. predators and microflora), and the environment. Either persistency or transiency will result from the outcome of this complex interaction, although a lack of dormancy would almos...
Article
Understanding how the environment regulates seed bank dormancy changes is essential for forecasting seedling emergence in actual and future climatic scenarios, and to interpret studies of dormancy mechanisms at the physiological and molecular level. Here we used a population threshold modelling approach to analyse dormancy changes through variation...
Article
Full-text available
Context. Tall fescue (Schedonorus arundinaceus) is one of the most important cultivated forage grasses in temperate regions but its association with some Epichloë fungal endophytes usually makes it unsuitable for livestock feeding due to toxic alkaloids. However, re-inoculation of plants with non-toxic endophytes can result in positive effects for...
Article
In warm‐temperate regions, the adoption of warm‐season forage grasses has been hindered by low and unpredictable seedling emergence because of seed dormancy. Developing models driven by temperature (T) and soil water potential (Ψ) may provide tools for choosing adequate sowing conditions. Models are usually developed with controlled chamber germina...
Article
Full-text available
Sunflower seed industry needs non‐dormant seeds (i.e., seeds with the capacity to germinate in a wide range of environmental conditions) for processing and packaging. Thus, the presence of persistent seed dormancy is an undesirable trait. Dormancy level depends on the genotype and on the maternal environment. The aim of the present work was to stud...
Article
Cultivated sunflowers display variable degrees of achene dormancy at harvest and persistence during storage, interfering with high‐quality hybrid seed production. Information on intraspecific variability for dormancy among cultivated sunflowers is scarce and was the subject of this work. A set of 21 sunflower genotypes of diverse origins (18 crop a...
Article
Full-text available
Sensitivity to water availability is a key physiological trait for grassland species located in arid and semiarid environments, where successful germination is closely related to rainfall dynamics. Festuca pallescens inhabits diverse environments along a steep precipitation gradient in North Patagonia, thus offering a suitable model for the study o...
Article
Nitrogen availability in Buglossoides arvensis mother plants influences seed dormancy level. Abscisic acid (ABA) levels chiefly determine primary dormancy during embryo maturation and its maintenance depends on ABA/gibberellic acid (GA) balance. We hypothesised that soil nitrogen fertilisation of B. arvensis mother plants affects seed sensitivity t...
Article
Temperature may regulate seed dormancy and germination and determine the geographical distribution of species. The present study investigated the thermal limits for seed germination of Polygonum ferrugineum (Polygonaceae), an aquatic emergent herb distributed throughout tropical and subtropical America. Seed germination responses to light and tempe...
Article
Full-text available
Emergence timing of weed species has critical ecological and agronomical implications. In several species, emergence patterns largely depend on the seedbank dormancy level, which is modulated by specific environmental factors. In addition, environmental conditions during seed maturation on the mother plant have shown marked effects on dormancy leve...
Article
Crop-weed interactions are affected by the environment alterations resulting from the crop presence, such as modifications in temperature, light quality and quantity and moisture conditions that could modify the weed performance. The objectives of this work were to study 1) how soybean [Glycine max (L.) Merr.] crop structure modifies the environmen...
Article
Full-text available
Seeds of weed species require light to terminate dormancy and give way to germination. It is documented that sensitivity to light in Polygonum aviculare seeds increases during dormancy release. However, it is not known whether this sensitivity is lost during dormancy induction. The aim of this study was to investigate and quantify the changes in do...
Chapter
Weeds are usually more vulnerable to control practices at the seedling stage or at early stages of their growth. Therefore, developing models to predict the timing and extent of weed emergence is useful to assist farmers and agronomist to time pre- and post-emergence control practices to increase their efficacy. However, many important weeds formin...
Article
Full-text available
Seedling emergence in the field is strongly related to the dynamics of dormancy release and induction of the seed bank, which is mainly regulated by soil temperature. However, there is limited information on how temperature-driven effects on dormancy changes are modulated by the seed hydration-level. We investigated the effect of seed water content...
Article
Full-text available
Polygonum aviculare seeds show high levels of primary dormancy (PD). Low winter temperatures alleviate dormancy and high spring temperatures induce seeds into secondary dormancy (SD), naturally establishing stable seedbanks cycling through years. The objective of this work was to elucidate the mechanism(s) involved in PD expression and release, and...
Article
Full-text available
Agricultural practices exert selective forces on weed populations. As these practices change over time, weed adaptive traits also evolve allowing weeds to persist in the new environment. However, only weeds showing individuals with the trait with adaptive significance will be able to cope with these changes thus allowing a sub-population to be sele...
Article
Digitaria sanguinalis is a troublesome annual weed that causes important yield losses in different crops. Despite this, there is scarce information about different aspects of its biology under field conditions. New knowledge about the establishment process of this species will be of paramount importance in order to maximise the effectiveness of wee...
Article
Full-text available
Emergence at an appropriate time and place is critical for maximizing plant fitness and hence sophisticated mechanisms such as seed dormancy have evolved. Although maternal influence on different aspects of dormancy behavior has been identified, its impact under field conditions and its relation to plant fitness has not been fully determined. This...
Article
We used two sunflower genotypes displaying pericarp-imposed dormancy at high incubation temperatures (i.e. 30°C) to investigate the role of the pericarp as a limitation to oxygen availability to the embryo (hypoxia), and its impact on embryo abscisic acid (ABA) content and sensitivity to ABA. Results showed that both genotypes displayed very differ...
Article
Seed germination is one of the earliest phenotypes expressed by plants, and the accuracy to germinate in the correct time and place is essential for plant population fitness. Cues that regulate germination have been exhaustively characterized in laboratory experiments. However, the way in which seed populations respond to these cues and the ecologi...
Poster
Full-text available
In temperate and sub-tropical regions, the adoption of adapted warm-season forage grasses has been a long standing objective. The adoption of these species has been hindered among other factors by their generally low and unpredictable seedling emergence. Temperature and moisture affect seed germination, seed dormancy and subsequent seedling establi...
Article
Cynara cardunculus is a troublesome weed in temperate grazing lands. Cynara cardunculus achenes are usually dormant at dispersal and require alternating temperatures to terminate dormancy and germinate. Laboratory and glasshouse experiments were conducted to determine (i) the treatments able to terminate dormancy and (ii) the effect of environmenta...
Article
Full-text available
Published information regarding the effect of storage temperature on dormancy alleviation of sunflower achenes is contradictory and ambiguous. In the present study we explored the effect of temperature during dry storage on dormancy release in two sunflower genotypes, including a commercial hybrid and an inbred line. Dry storage at 25°C consistentl...
Article
The success of large crabgrass (Digitaria sanguinalis) growing among summer crops in Argentina, may be partly explained by its escape from weed controls related to the emergence of different seedlings cohorts determined by seed dormancy and germination requirements. The objectives of this work were to evaluate the effect of temperature, red (R):far...
Article
Full-text available
For seed banks showing seasonal changes in their dormancy level, the possibility of predicting temporal patterns of emergence depends on establishing a robust relationship between temperature and the rate of dormancy loss and induction. However, although the effect of temperature on dormancy loss has been extensively studied, less work has been adv...
Article
In seeds of many summer annuals low temperatures under moist conditions provoke dormancy release while high temperatures induce secondary dormancy. Seed dormancy level establishes the range of temperatures under which germination is possible. The range of temperatures permissive for seed germination is determined by two threshold limit temperatures...
Chapter
Field seed performance is largely modulated by environmental factors, mainly temperature and water availability, but also depends on seed intrinsic factors. In oil crops, seed oil content may influence water absorption by seeds, while fatty acid composition might be associated to the germination temperature response. Although the composition of cel...
Article
Sunflower (Helianthus annuus L.) achenes often display pericarp-imposed dormancy, which is long-lasting and causes serious problems to crop production and the seed industry. For this study we assessed an extensively used sunflower inbred line that has this type of dormancy. Our goals were (i) to determine the effect of pericarp on germination and t...
Article
Full-text available
Seeds integrate environmental cues that modulate their dormancy and germination. Although many mechanisms have been identified in laboratory experiments, their contribution to germination dynamics in existing communities and their involvement in defining species habitats remain elusive. By coupling mathematical models with ecological data we invest...
Article
Full-text available
Temperature is a key factor affecting both dormancy and germination. In non-dormant seeds, when temperature is within the thermal range permissive for germination, it just regulates germination velocity, while in seeds presenting dormancy it can also be affecting dormancy level, dormancy termination and the expression of dormancy itself. This dual...
Article
Full-text available
Two possible sources of resistance to pre-harvest sprouting were evaluated in quinoa. They showed dormancy at harvest and significant variations in dormancy level in response to environmental conditions experienced during seed development. The aims of this work were to evaluate the importance of seed coats in the regulation of dormancy in this spec...
Article
Light regulates dormancy termination and the subsequent germination in many weed species. Under field conditions, the light environment of the seeds, which is perceived mainly by photoreceptors of the phytochrome family, provides essential information for cueing germination in the proper environmental situation. The light environment's spectral com...
Article
Full-text available
Pre-harvest sprouting (PHS) is a serious risk when adapting quinoa (Chenopodium quinoa) seed production to different temperate environments. Two quinoa accessions, ‘2-Want’ and ‘Chadmo’ were evaluated under field conditions in the Argentinean pampas over 2 years on five different sowing dates, to explore a range of climate conditions under which se...
Article
Full-text available
El brotado pre-cosecha es uno de los problemas que limitan la expansión del cultivo de quínoa hacia regiones húmedas. En la Pampa Húmeda Argentina es común la ocurrencia de condiciones de alta humedad relativa o lluvias prolongadas en cualquier momento del año, lo que dificulta el ajuste del período de maduración del grano al patrón de lluvias. Cua...
Article
Full-text available
The effect of various combinations of temperature and relative humidity on dormancy alleviation of sunflower seeds during dry after-ripening was investigated. The rate of dormancy alleviation depended on both temperature and embryo moisture content (MC). Below an embryo MC of 0.1 g H(2)O g(-1) dw, dormancy release was faster at 15 °C than at higher...
Article
Full-text available
The possibility of accurately predicting timing and extent of seedling emergence from natural seed soil banks has long been an objective of both ecologist and agriculturalist. However, as dormancy is a common attribute of many wild seed populations, we should first be able to predict dormancy changes if we intend to predict seedling emergence in th...
Article
Mathematical models that predict emergence of weed seedbanks could be useful tools for determining the most suitable time for weed seedling control and, consequently, should result in a higher efficacy of applied control methods. To achieve this goal in dormant weed species, functional relationships should be established between environmental facto...
Article
Full-text available
Models based on thermal-time approaches have been a useful tool for characterizing and predicting seed germination and dormancy release in relation to time and temperature. The aims of the present work were to evaluate the relative accuracy of different thermal-time approaches for the description of germination in Lithospermum arvense and to develo...
Article
Full-text available
It has been hypothesized that soil moisture conditions could affect the dormancy status of buried weed seeds, and, consequently, their sensitivity to light stimuli. In this study, an investigation is made of the effect of different soil moisture conditions during cold-induced dormancy loss on changes in the sensitivity of Polygonum aviculare seeds...
Article
The development of models that allow the prediction of timing and extent of weed emergence is essential for planning more effective weed control strategies in agricultural systems. Dormancy is a common attribute of many weed seed populations and this hampers the task of predicting emergence from weed seed banks under field conditions. In this paper...
Article
Full-text available
It has been hypothesized that fluctuations in soil water content may affect the dormancy status of weed seed banks under field conditions. In this paper, we present results showing that fluctuations in soil water content affect the dormancy status of buried seeds of Polygonum aviculare L. stored at dormancy-releasing temperatures. Effects of fluctu...
Article
The effect of cold (stratification) temperature on changes in the sensitivity of Polygonum aviculare seeds to light was investigated. Seeds buried in pots were stored under stratification temperatures (1.6, 7 and 12 degrees C) for 137 d. Seeds exhumed at regular intervals during storage were exposed to different light treatments. Germination respon...
Article
Full-text available
Changes in population hydrotime parameters were determined during stratification in Polygonum aviculare L. seeds in order to model dormancy loss. Seeds buried in pots were stored at three temperatures (1.6, 7 and 12°C) for 110 d and were exhumed at regular intervals during the storage period. Exhumed seeds were incubated at different water potentia...
Article
Full-text available
The sensitivity of Polygonum aviculare L. seeds to the dormancy-breaking effect of cycle-doses of fluctuating temperature changes as seeds lose dormancy due to storage under stratification temperatures. Sensitivity changes during seed stratification were characterized by a decrease in the number of cycles required to saturate the germination respon...
Article
Full-text available
A model for simulating Polygonum aviculare L. seed dormancy loss in relation to stratification temperature was developed. The model employs the lower limit temperature for germination (Tl) as an index of seed population dormancy status. While population mean for Tl (Tl(50)) and Tl distribution within the population (σTl) are allowed to vary as seed...
Article
1. An early inhibition of germination in seeds of Silene gallica and Brassica campestris which were continuously exposed to the light environment under an establishing wheat canopy, was observed in two different experiments. Inhibition occurred c.15 days after crop emergence, when the canopy leaf area index (LAI) was below one and the red (R):far-r...

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Project (1)
Project
The aim of this project is to understand the environmental effect on the seed dormancy and germination of Echinochloa crus-galli and develop models to predict their emergence under field conditions.