منابع مشابه
Biosynthesis of gibberellins. IV. Biosynthesis of cyclic diterpenes from trans-geranylgeranyl pyrophosphate.
A l*C-diterpene alcohol (copalol) was isolated as its 4-(4’nitrophenylazo)benzoyl ester from a soluble enzyme system which had been prepared from a cell-free extract of mycelia of the fungus Gibberella fujikuroi and incubated with ZJ*Cmevalonate, ATP, and MgC12. Copalol was identified as trans-( -)-labda-8(16), 13-dien-15-01 from its properties, in comparison with those of the enantiomeric alco...
متن کاملGibberellins
What are they? The gibberellins make up a family of small organic compounds derived from a common 20-carbon precursor. They regulate growth and development in plants and their chemical structure superficially resembles that of steroid hormones. So far, more than 100 gibberellins have been identified. Fortunately, any one plant species produces only a few of the known gibberellins. Furthermore, ...
متن کاملComparison of the enzymatic properties of ent-copalyl diphosphate synthases in the biosynthesis of phytoalexins and gibberellins in rice.
The rice genome contains two ent-copalyl diphosphate synthase genes: OsCPS1 acts in gibberellin (phytohormone) biosynthesis, and OsCPS2/OsCyc2 acts in the synthesis of oryzalexins A-F and phytocassanes A-E (phytoalexins). We characterized the enzymatic properties of recombinant OsCPS2/OsCyc2 fused with a tag-protein at the N-terminus, and compared them to those of OsCPS1. Several enzymatic prop...
متن کاملGibberellins repress photomorphogenesis in darkness.
Plants undergo two different developmental programs depending on whether they are growing in darkness (skotomorphogenesis) or in the presence of light (photomorphogenesis). It has been proposed that the latter is the default pathway followed by many plants after germination and before the seedling emerges from soil. The transition between the two pathways is tightly regulated. The conserved COP...
متن کاملMechanistic action of gibberellins in legume nodulation.
Legume plants are capable of entering into a symbiotic relationship with rhizobia bacteria. This results in the formation of novel organs on their roots, called nodules, in which the bacteria capture atmospheric nitrogen and provide it as ammonium to the host plant. Complex molecular and physiological changes are involved in the formation and establishment of such nodules. Several phytohormones...
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ژورنال
عنوان ژورنال: Journal of Biological Chemistry
سال: 1969
ISSN: 0021-9258
DOI: 10.1016/s0021-9258(18)93114-5