Legumes play a crucial role in agricultural and ecosystems based on their ability to convert atmospheric nitrogen gas into plant-available ammonium in symbiosis with soil bacteria commonly called ‘rhizobia’. This nitrogen-fixing ability makes legumes attractive as an agricultural, economical and environmentally friendly crop as their requirement for nitrogen fertilizer is reduced, leading to a ...

Plant development is amazingly plastic — for example, identical pine seeds can give rise to a majestic tree in a forest or a scraggly bush on a rocky cliff. How is plant growth and development regulated so as to be capable of achieving such dramatically different endpoints? One factor that has emerged as a key regulator of plant form is gibberellin (GA; see Figure 1 inset for the chemical struc...

BYERS J. A., BREWER J. W. & DENNA D. W. 1976. Plant growth hormones in pinyon insect galls. Marcellio 39, 125-134. Larvae of the midge Janetiella sp. near J. coloradensis Felt (Diptera: Cecidomyiidae) cause galls at the base of young needles of pinyon Pinus edulis Engelm. Bioassays of extracts from these galls contained as much as 17 times more auxin activity and as much as 21 times more gibber...

Priming is one of the seed enhancement methods that might be resulted in increased seed performance (germination and emergence), seedling growth and plant yield under stress conditions, such as salinity, temperature and drought stress. In order to evaluate the effect of growth hormones on morphology characteristics and essential oil of basil under drought stress condition, a experiment was cond...

Research on the classical plant hormones continues to uncover fascinating interactions between these crucial regulatory compounds.Recent papers describe ‘crosstalk’ between the abscisic acid and ethylene signaling pathways in Arabidopsis, and how the nature of this interaction depends on organ type.Auxin has now been shown to promote the biosynthesis of active gibberellin in pea,by up-regulatin...

Higher plants are exposed to a multitude of fungi and bacteria, which are present in the surrounding phyllosphere and rhizosphere and which may also grow inside the shoot and the root. Compounds, known to act as hormones in higher plants, are produced by many of these microorganisms and are often functionalized in “friendly” or “hostile” interaction with the respective host plant. A large numbe...

There are adequate grounds for believing in the existence of nuclear or cytoplasmic receptors mediating transcriptional or translational effects of plant hormones, and several putative receptor proteins have received limited experimental study [see Venis (1973) for review and also Fox & Erion (1975)l. At the same time many physiological responses to plant hormones, especially to auxins, take pl...

Plant hormones are small-molecule signaling compounds that are collectively involved in all aspects of plant growth and development. Unlike animals, plants actively regulate the spatial distribution of several of their hormones. For example, auxin transport results in the formation of auxin maxima that have a key role in developmental patterning. However, the spatial distribution of the other p...

abstract in order to study of two hormones effects of gibberellin and benzyl adenine on (zantedeschia aethiopica cv.childsiana) pot plant characteristics, non dormant rhizomes dipped preplanting in gibberellin solution with concentrations including (0, 100, 200 and 500 ppm) and sprayed in two weeks once to flowering time with benzyl adenine solutions including (0, 100, 200 and 500 ppm). interac...

Priming is one of the seed enhancement methods that might be resulted in increased seed performance (germination and emergence), seedling growth and plant yield under stress conditions, such as salinity, temperature and drought stress. In order to evaluate the effect of growth hormones on morphology characteristics and essential oil of basil under drought stress condition, a experiment was cond...