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Mostrando ítems 31-40 de 2003
Strong surjectivity of maps from 2-complexes into the 2-sphere
(VERSITA, 2010)
Given a model 2-complex K(P) of a group presentation P, we associate to it an integer matrix Delta(P) and we prove that a cellular map f : K(P) -> S(2) is root free (is not strongly surjective) if and only if the diophantine ...
Stem-cutting anatomy and biochemical responses associated with competence for adventitious root differentiation in Acca sellowiana (Myrtaceae)
(Springer, 2021-08)
Successful development of adventitious roots (AR) in cuttings imposes an important limitation to the propagation of woody plants and in some species, the ability to form AR is strongly affected by genotype. However, we ...
Distribution of endogenous NO regulates early gravitropic response and PIN2 localization in arabidopsis roots
(Frontiers Media S.A., 2018-04-20)
High-resolution and automated image analysis of individual roots demonstrated that endogenous nitric oxide (NO) contribute significantly to gravitropism of Arabidopsis roots. Lowering of endogenous NO concentrations strongly ...
Maize root architecture and water stress tolerance: an approximation from crop models
(Amer Soc Agronomy, 2014-12)
This work presents an assessment of potential advantages of drought tolerance in maize (Zea mays L.) production. A higher water uptake resulting from an enhanced root exploration at deep soil layers seems to be the most ...
Expression of proteins in the extracellular matrix of pulp tissue in human primary teeth during physiologic root resorption
(QUINTESSENCE PUBLISHING CO INC, 2009)
Objectives: To analyze the expression of tenascin, fibronectin, collagens I and III, osteonectin, and bone morphogenetic protein 4 (BMP4) in the extracellular matrix of pulp tissue in primary teeth during physiologic root ...
Mechanisms of waterlogging tolerance in wheat - a review of root and shoot physiology
(Wiley, 2016-05)
We review the detrimental effects of waterlogging on physiology, growth and yield of wheat. We highlight traits contributing to waterlogging tolerance and genetic diversity in wheat. Death of seminal roots and restriction ...
Variability in soil physical-chemical properties along the root-explored profile in deep Oxisols of commercial eucalypt plantations
(Elsevier B.V., 2021-08-15)
While deep soils commonly characterize tropical forests, direct measurements of soil physical & ndash;chemical properties, fine root distributions, and relationships among them are scarce. In this paper, we report results ...