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Novel mechanisms of growth hormone regulation: growth hormone-releasing peptides and ghrelin
(Associação Brasileira de Divulgação Científica, 2006-08-01)
Growth hormone secretion is classically modulated by two hypothalamic hormones, growth hormone-releasing hormone and somatostatin. A third pathway was proposed in the last decade, which involves the growth hormone ...
In vitro culture and endogenous hormone levels in immature zygotic embryos, endosperm and callus cultures of normal and high-lysine barley genotypes
(2001)
Endogenous hormone levels viz. indole-3-acetic acid (IAA), abscisic acid, gibberellins 1, 3 and 20 (GAs), zcatin/zeatin riboside and N6(Δ2-isopentenyl) adenine/ N6(Δ2-i sopentenyl) adenosine were determined in immature ...
Participation of plant hormones in determination and progression of somatic embryogenesis
(2005-11)
In vitro culture protocols have been developed for many species, mainly using empirical approaches, to induce somatic embryogenesis from various explant types. However, the underlying biochemical mechanisms governing ...
Endogenous hormonal status of embryogenic callus in cocos (Cocos nucifera L.) explants
(1997-01-01)
Endogenous hormonal concentrations of Z/ZR, IP/IPA, ABA and free IAA were determined in Cocos in vitro cultures during the period of embryogenic callus (calloid) formation and in selected tissues after 16 weeks grown on ...
Lack of genotoxicity induced by endogenous and synthetic female sex hormones in peripheral blood cells detected by alkaline Comet assay
(Wiley-Blackwell, 2007-06-01)
The etiology of hormone-induced cancers has been considered to be a combination of genotoxic and epigenetic events. Currently, the Comet assay is widely used for detecting genotoxicity because it is relatively simple, ...
Lack of genotoxicity induced by endogenous and synthetic female sex hormones in peripheral blood cells detected by alkaline Comet assay
(Wiley-Blackwell, 2007-06-01)
The etiology of hormone-induced cancers has been considered to be a combination of genotoxic and epigenetic events. Currently, the Comet assay is widely used for detecting genotoxicity because it is relatively simple, ...
Alterations of Endogenous Hormonal Levels in Plants under Drought and Salinity
(Scientific Research Publishing Inc., 2016-07)
The phytohormones are pivotal chemical messengers produced within the plant that regulate its growth and development, and responses to environmental stimuli. Drought and salinity are adverse environmental factors that ...
Endogenous hormonal status of embryogenic callus in cocos (Cocos nucifera L.) explants
(1996-01-01)
The application of optimum concentrations of hormones according to specific culture stages plays an important role, especially in plants which are concerned lo be recalcitrant for propagation in vitro, like Cocos nucifera ...
Relationship between endogenous hormone levels of grapevine callus cultures and their morphogenetic behaviour
(2000-01-01)
Dark callus cultures from leaves and anthers of three grapevine genotypes (Seyval blanc, Riesling and Trollinger) were propagated in vitro for almost two years on medium deprived of growth regulators. Three different callus ...