Start Discovering Solved Questions and Your Course Assignments
TextBooks Included
Active Tutors
Asked Questions
Answered Questions
dormant vegetative structuresyou have learnt that light a period of chilling or application of gibberellin often breaks seed dormancy and stimulates
metabolic eventslet us now examine the changes that occur in the seeds after they imbibe water in general the most important metabolic events are
seed germination - development of plantthe environmental factors that influence the germination of seeds are water availability optimal light
phases of seed formationthe process of seed formation can be divided into two phases the division phase in which fertilised egg divides mitotically
vegetative development - developmentthe process of growth and differentiation of cells into organs and organisms is often termed development for
vegetative development - morphogenesisthis term is coined for the process leading to and determining the form and structure of organs it is used
vegetative development - differentiationit is referred to as qualitative changes that lead to increased specialisation for example the formation of
vegetative development - growthit is quantitative and irreversible change it reflects an increase in size and volume of an organism for example the
development and differentiation of a flowering plantthe developmental phases of a flowering plant involve seed germination vegetative growth
procedure of hormone actall plant hormones show extraordinary varied complex effects in controlling plant growth and development extrapolation from
growth regulatorsbesides the major five hormones polyamines can also exert regulatory control over growth and development at micromolar
roles of abscisic acidabscisic acid aba is a particularly interesting hormone with regard to the regulation of its own levels its levels rise and
ethylene - plant hormonesamongst hormones in both plant and animal kingdoms ethylene a gaseous hydrocarbon is unique despite its chemical simplicity
features of plant hormonesthe following are the important features of the role of plant hormones in growth and development the hormone may initiate
discovery of plant hormonesto date five major classes of plant hormones have been discovered namely auxins gibberellins cytokinins abscisic acid and
nitrogen control of nitrogen assimilationn2-fixer like klebsiella pneumoniae and nostoc can grow with n2 no-3 or nh4 as nitrogen source you would
regulation of ammonia assimilationheterotrophic bacteria like escherichia coli and klebsiella aerogenes induce the operation of gs-glutamate synthase
characteristics of ammonium transport systemthe following are the characteristics of ammonium transport system ammonium transport system is ammonia
uptake of ammoniaammonia nh3 diffuses freely across biological membranes according to its concentration gradient however ammonium nh4 ion requires a
ammonia assimilation - inorganic nitrogen and sulphur metabolismnitrogen n2 gas and no3 are the most common available forms of inorganic nitrogen
inhibitor proteins - enzyme-activity controlone kind of inhibitor protein found in higher plants is an endopeptidase which degrades nitrate reductase
cyanide - enzyme-activity controlplants generate cyanide from cyanogenic glucides and histidines ethylene biosynthesis is also accompanied by cyanide
enzyme synthesisnitrate assimilating system in general is known to show increase in nitrate uptake system and nitrate reductase system in the
modes of no-3 reductionaccordingly there are the following three basic modes of no-3 reduction directly dependent upon photosynthesis as in
distribution of nitrate reductase and nitrite reductaselet us see whether nitrate assimilation depends upon the reductants produced in photosynthesis