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Mostrando ítems 21-30 de 2059
Trade-off between root porosity and mechanical strength in species with different types of aerenchyma
(Wiley Blackwell Publishing, Inc, 2007-05)
The objective of this work was to study the existence of a trade-off between aerenchyma formation and root mechanical strength. To this end, relationships among root anatomical traits and mechanical properties were analysed ...
Decomposition and nutrient release of grass and tree fine roots along an environmental gradient in southern Patagonia
(Wiley Blackwell Publishing, Inc, 2019-03)
Decomposition of fine roots is a fundamental ecosystem process that relates to carbon (C) and nutrient cycling in terrestrial ecosystems. However, this important ecosystem process has been hardly studied in Patagonian ...
Production and turnover rates of shallow fine roots in rangelands of the Patagonian Monte, Argentina
(Springer Tokyo, 2012-01)
Selective sheep grazing in arid rangelands induces a decrease in total cover and grass cover and an increase in the dominance of shrubs. Both life forms differ in aboveground and belowground traits. We hypothesized that ...
Abscisic acid and nitric oxide modulate cytoskeleton organization, root hair growth and ectopic hair formation in Arabidopsis
(Academic Press Inc Elsevier Science, 2018-11)
Abscisic acid (ABA) and nitric oxide (NO) are two plant growth regulators that participate in many signaling cascades in different organs all along the plant life. Here, we were interested in deciphering the effects of ABA ...
The LOB-like transcription factor Mt LBD1 controls Medicago truncatula root architecture under salt stress
(Taylor & Francis, 2010-12)
Lateral root (LR) formation and emergence are influenced by the environment and determines the architecture of the root system in the soil. Whereas auxins appear as the main hormone controlling LR initiation, patterning ...
A simple method to obtain endophytic microorganisms from field-collected roots
(Pergamon-Elsevier Science Ltd, 2008-05)
We describe a simple technique for obtaining endophytic microorganisms from field-collected roots. Roots of plant species were surfaced-sterilized, cut into pieces, and then each root piece was transferred to drops of ...
Grass-shrub coexistence: understanding root distribution in ecological sites of the Semiarid Chaco, Argentina
(Taylor & Francis, 2021-12)
The objective of this study was to analyze the root distribution of grasses and shrubs, at different soil depths, in two ecological sites (ES): highland (forest) and lowland (grassland). The root density (RD) estimation ...
Asteroidal quadruples in non rooted path graphs
(Discussiones Mathematicae Graph Theory, 2015-01)
A directed path graph is the intersection graph of a family of directed subpaths of a directed tree. A rooted path graph is the intersection graph of a family of directed subpaths of a rooted tree. Rooted path graphs are ...
Root silicification of grasses and crops from the Pampean region and its relevance to silica and silicophytolith content of soils
(Springer, 2019-11)
Aims: Silicophytoliths contribute to the pool of amorphous silica that is incorporated into the soils acting as intermediary in the biogeochemical cycle of silicon. Most studies focus their attention in the production of ...
Root phenotypes of dwarf and “overgrowth” SLN1 barley mutants, and implications for hypoxic stress tolerance
(Elsevier Gmbh, 2019-03)
Gibberellins are central to the regulation of plant development and growth. Action of gibberellins involves the degradation of DELLA proteins, which are negative regulators of growth. In barley (Hordeum vulgare), certain ...