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Introduction
Mariel G. Perreta currently works at the ICiAgro Litoral Institute (UNL-CONICET) in Faculty of Ciencias Agrarias de Universidad Nacional del Litoral. Mariel does research in Botany, Agronomy and Agricultural Plant Science
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Current institution
ICiAgro Litoral
Publications
Publications (45)
The use of tillage (disc harrow) has become infrequent due to the widespread adoption of no-tillage. The latter has caused numerous problems to the soil structure, leading farmers to alternate the tillage system used. The objective of this work was to evaluate if the sporadic use of tillage affects the weed community, in soybean crops of the centra...
Prosopis alba posee potencial para la producción forestal y forrajera, destacándose su utilización en zonas áridas y semi-áridas. La especie, considerada de difícil enraizamiento, se propaga comercialmente mediante semillas. Su clonación permitiría cultivar materiales de interés silvícola altamente productivos y en un menor tiempo. El objetivo de e...
Background and aims: Commelina erecta and Eutsachys retusa are two perennial weeds, which show high resprouting after glyphosate application. This behavior represents a serious problem for weed management. The purpose of this study was to characterize the bud bank of both species and to assess their response to glyphosate application.
M&M: We anal...
En el sector florícola de Argentina la producción de verdes de corte es escasa y el follaje utilizado es de uso extractivo, ocasionando la pérdida de germoplasma en la naturaleza. La incorporación de nuevas especies para uso como follaje de corte permitiría cubrir esa demanda no satisfecha. Las especies epífitas Campyloneurum nitidum (CN) y Niphidi...
Eustachys retusa es una gramínea perenne nativa de creciente importancia en los agroecosistemas de la actualidad, ya que en estadios reproductivos no es controlada, y tolera dosis de hasta 1200 g i.a. ha-1 del herbicida glifosato, el principal compuesto utilizado. Presenta un ciclo primavero-estival, floreciendo de octubre a junio. A campo, se obse...
In many countries, Amaranthus hybridus is a widespread weed in agricultural systems. The high prolificacy and invasive capacity as well as the resistance of some biotypes to herbicides are among the complications of handling this weed. This paper reports on the first A. hybridus biotypes with resistance to auxinic herbicides and multiple resistance...
In many countries, Amaranthus hybridus is a widespread weed in agricultural systems. The high prolificacy and invasive capacity as well as the resistance of some biotypes to herbicides are among the complications of handling this weed. This paper reports on the first A. hybridus biotypes with resistance to auxinic herbicides and multiple resistance...
Objectives: Mechanical impedance causes structural changes in roots. Nevertheless, little is known about the changes in soybean root systems grown under compacted soils (mechanical impedance). The aim of this work was to understand the morphological and topological-architectural changes occurred in plants root system of soybean grown under soil com...
This review is intended: (1) to interpret and characterize morphological variations observed in the structure of the enrichment axes, located below the terminal inflorescence in Poaceae; and (2) to study the relationship between the intensity of development of such axes and the size of terminal inflorescence. An important reduction in the developme...
Eustachys retusa has low sensitivity to glyphosate at the reproductive stage. The purpose of this study was to analyze the effect of glyphosate on adult E. retusa plants in order to identify the traits that make possible their regeneration in no-tillage systems. For this purpose, reproductive-stage specimens from wild populations were treated with...
Paspalum vaginatum Sw. is a perennial grass originating from tropical and subtropical regions worldwide that plays important ecological and utilitarian roles such as dune stabilisation and erosion control, and is used as a lawn and forage plant. The vegetative morphology of shoots was studied using an architectural approach with the aim of identify...
Conyza é um gênero que pertence á família das compostas, Ateraceae, tribo Asteraceae e subtribo Conyzinae (Theabaud & Abbott, 1995; Teles & Stehmann, 2008; Green, 2010; Santos et al., 2014). Existem cerca de 60 espécies de Conyza dispersas globalmente dentro de climas temperados e zonas subtropicais (Theabaud & Abbott, 1995; Santos et al., 2014), c...
La utilización repetida de glifosato como herbicida, entre otros aspectos, aumenta la frecuencia de individuos con baja sensibilidad al mismo. Entre los numerosos casos reportados de especies de malezas que han presentado algún inconveniente para su adecuado manejo se encuentra Petunia axillaris. En este trabajo se evalúa su sensibilidad y se estud...
La utilización repetida de glifosato como herbicida, entre otros aspectos, aumenta la frecuencia de individuos con baja sensibilidad al mismo. Entre los numerosos casos reportados de especies de malezas que han presentado algún inconveniente para su adecuado manejo se encuentra Petunia axillaris. En este trabajo se evalúa su sensibilidad y se estud...
Iresine diffusa has become more abundant under no-till soyabean in Argentina. The influence of temperature, light, cold-wet storage, osmotic potential, dry storage and depth of seed burial on germination and emergence of I. diffusa was examined in a growth chamber experiment. Iresine diffusa seeds germinated at the highest proportion (>0.80) in all...
This work analyzes growth forms in V. persica and P. debilis, in order to identify their structural development under undisturbed conditions. Branching systems of shoots and their temporal and spatial variation, several structural and developmental features as well as growth direction and foliar sequence were studied in plants grown from seed in gr...
This work analyzes growth forms in V. persica and P. debilis, in order to identify their structural development under undisturbed conditions. Branching systems of shoots and their temporal and spatial variation, several structural and developmental features as well as growth direction and foliar sequence were studied in plants grown from seed in gr...
Controlled growth chamber experiments were conducted to determine factors affecting seed germination and emergence of the troublesome weed Gomphrena perennis. The objective of this research was to examine the effects of temperature, light, moist chilling, osmotic potential, dry storage and depth of seed burial on G. perennis germination and emergen...
The purpose of this study was to analyze the structural variations of Commelina erecta, a glyphosate-tolerant weed, produced by this herbicide. Regrowth shoots (vegetative cloning axes) and seedlings and two glyphosate concentrations: 900 and 1800 grams of acid equivalent per hectare (ga.e. ha⁻¹) were used. The following variations were observed: f...
The aim of this work was to study the effect of fall defoliation and chemical application on the progression and release of dormancy, and phenology, of low-chill peach ‘Flordaking’ under temperate climate conditions. At the onset of leaf fall, ‘Flordaking’ peach (Prunus persica L. Batsch) trees were defoliated or treated with hydrogen cyanamide (2....
The architecture of the shoot branching system in Poaceae defines the growth forms within this family. The specific characteristics of the main axis as well as the disposition and characteristics of the lateral shoots determine the main structural variations found among species. In this work, we discuss the set of parameters to be taken into accoun...
The structure of the synflorescence and the flowering unit (inflorescence) in Commelinaceae are characterized. The synflorescence is polytelic and the basic inflorescence type is a terminal pedunculate thyrse with an indeterminate central axis to which several to many cincinni are attached. Each thyrse is a florescence, and each cincinnus is a part...
Chloris gayana Kunth is a grass species valuable as forage which was introduced into Argentina to be used as pasture in saline soils of subtropical and warm-temperate zones, given its good adaptability to drought, salinity and mild freezing. However, its tolerance varies according to the cultivar. In tetraploid cultivars, important reductions in yi...
The objective of this review work is to characterize the enrichment axes in Poaceae, especially integrating into that analysis of those species with basal or subterranean cleistogamous spikelets. We recognize five types of enrichment axes: paraclades of the unit of inflorescence (UIF), paraclades of the trophotagma (TT) with exposed UIF; paraclades...
This work presents the basics for interpreting the adult inflorescence structure in grasses. It provides an analysis of the This work presents the basics for interpreting the adult inflorescence structure in grasses. It provides an analysis of the
variations in the grass inflorescence structure and their correlation with some of the developmental p...
The structure of the synflorescence and the flowering units in Amaranthaceae are characterized. The synflorescence is polytelic.
In the flowering unit we recognize the main florescence and the enrichment zone. The florescences may consist of: (1) Fully
developed partial florescences bearing three or more flowers; (2) Partial florescences reduced to...
The branching system of cultivated and wild populations of the climbing grass Melica sarmentosa Nees is described on the basis of cultivated and field plant observation. Two types of axes are recognized, namely, ‘basal climbing axes’ and ‘distal climbing axes’. These axes differ in position and morphology and show a particular distribution of branc...
Melica macra Nees is a widespread grass of Central and Northern Argentina. It is considered an invasive weed in natural grasslands. The aim of the present paper is to describe the branching system of M. macra on the base of both the analysis of living plants obtained from seeds and maintained under cultivation, and the observation of plants growing...
RESUMEN En las últimas décadas han surgido distintas aproximaciones al aspecto dinámico e integral del crecimiento de las plantas, que interpretan en forma variada su estructura. Estas formas de abordar el estudio de los patrones de crecimiento son: sistema de vástagos, forma de crecimiento, arquitectura vegetal, teoría de plantas clonales y tipolo...
Sinflorescencias de 17 especies del género Melica presentes en Argentina han sido estudiadas desde
el punto de vista tipológico. Las inflorescencias son politélicas, presentan florescencia principal, no
sufrieron procesos de homogeneización y/o truncamiento y muestran un patrón similar de desarrollo de
la zona paracladial. Las principales variacion...
Synflorescences of 17 species of Melica belonging to the argentinian flora were studied from a typological point of view. These species have polytelic inflorescences with a main florescence and a similar structural pattern in the paracladial zone. Processes of truncation and homogeneization were not observed. Among species, inflorescences mainly di...
The aim of the present paper is analyses the variability of the anatomy stem elements at different levels on the flowering shoots in Leersia hexandra, Luziola peruviana, Rhynchoryza subulata and Zizaniopsis bonariensis (Oryzeae - Poaceae). Samples were fixed in FAA, dehydrated, embedded in paraffin, sectioned with rotary microtome, stained with saf...
The anatomy of leaves and bracts of Cyperus prolixus H.B.K. is described, with emphasis on Kranz structure. The distribution of Kranz units in Cyperus prolixus is discussed in relation to the one present in C-4 species of Cyperus.
The inflorescence of Cyperus giganteusVahl is characterized considering its typological features, and compared with the structural patterns described for other Cyperaceae inflorescences.
Der Infloreszenzaufbau von Cyperus giganteusVahl wird analysiert und unter Berücksichtigung der typologischen Übereinstimmungen mit den für andere Cyperaceen besch...
Perreta, M. G., Tivano, J. C. & Vegetti, A. C. 2000. Forma de crecimiento en Leptochloachloridiformis (Poaceae). Darwiniana 38(3-4): 219-226.El objetivo de este trabajo fue analizar la forma de crecimiento de Leptochloa chloridiformis (Hack.)Parodi. En esta especie perenne la ramificación ocurre principalmente a través de yemas axilarespresentes en...
The aim of this work was to study the growth form of Leptochloa chloridiformis (Hack.) Parodi. In this perennial species branching occurs mainly from the axillar buds of the innovation zone. This branching system generates a caespitose plant, in which the connections between structural units are short rhizomes. According to their positions, these c...
