• Publications
  • Influence
Genetic control of abscisic acid biosynthesis in maize.
The viviparous seed mutants of maize identify genes involved in synthesis and perception of ABA, a apocarotenoid synthesized from cleavage of carotenoids, which regulates seed maturation and stress responses in plants. Expand
Overexpression of a Novel Class of Gibberellin 2-Oxidases Decreases Gibberellin Levels and Creates Dwarf Plants Article, publication date, and citation information can be found at
Two genes in Arabidopsis identified using an activation-tagging mutant screen that encode 2β-hydroxylases are found to constitute a separate class of GA-modifying enzymes, and enzymatic assays demonstrated that At GA2ox7 and AtGA2ox8 both perform the same GA modification: 2 β-Hydroxylation of C20-GAs but not of C19- GAs. Expand
The 9-cis-epoxycarotenoid cleavage reaction is the key regulatory step of abscisic acid biosynthesis in water-stressed bean.
  • X. Qin, J. Zeevaart
  • Biology, Medicine
  • Proceedings of the National Academy of Sciences…
  • 21 December 1999
The results provide evidence that drought-induced ABA biosynthesis is regulated by the 9-cis-epoxycarotenoids cleavage reaction and that this reaction takes place in the thylakoids, where the carotenoid substrate is located. Expand
Characterization of a Novel Carotenoid Cleavage Dioxygenase from Plants*
The characterization of these activities offers the potential to synthesize a variety of interesting, natural products and is the first step in determining the function of this gene family in plants. Expand
A Novel Class of Gibberellin 2-Oxidases Control Semidwarfism, Tillering, and Root Development in Rice[W]
It is shown that members of the rice (Oryza sativa) GA2ox family are differentially regulated and act in concert or individually to control GA levels during flowering, tillering, and seed germination and that improvements in plant architecture could be induced by overexpression of wild-type or modified C20 GA 2oxs. Expand
A gibberellin insensitive mutant of Arabidopsis thaliana
A dwarf mutant of Arabidopsis thaliana (L.) Heynh. was found to be less sensitive to applied gibberellins than the wild type, and this character was controlled by one partially-dominant gene (denotedExpand
Enhancement of Phloem exudation from cut petioles by chelating agents.
The photosynthetic assimilates in leaves of Perilla crispa attached to the plant were labeled by treating the leaves with (14)CO(2), and it was concluded that the radioactive products in the solution are actually exuded by the phloem. Expand
Metabolism and physiology of abscisic acid
This paper presents a meta-analysis of biosynthesis in Fungi, focusing on the role of xanthoxin in the biosynthetic pathway and its role in the regulation in plants. Expand
Endogenous gibberellins in Arabidopsis thaliana and possible steps blocked in the biosynthetic pathways of the semidwarf ga4 and ga5 mutants.
The reduced levels of the 3 beta-hydroxy-GAs, GA1 and GA4, are the cause of the semidwarf growth habit of both ga4 and ga5 mutants and indicate that GA9 is not active in Arabidopsis, but it must be 3 Beta-hydroxylated to GA4 to become bioactive. Expand
Chapter 8 - Abscisic acid metabolism and its regulation
It is recognized that ABA has little, if any, role in the processes of abscission and bud dormancy, and knowledge of the ABA biosynthetic pathway may lead to modification of ABA-mediated processes by altering ABA levels in plants. Expand