Plant Growth Regulators Classified by Function
Plant Growth Regulators (PGRs) yog cov tshuaj hluavtaws uas muaj tib lub cev muaj zog thiab cov qauv tshuaj zoo ib yam li cov tshuaj hormones endogenous. Kev poob rau hauv ntau hom tshuaj tua kab, PGRs yog siv los tswj cov nroj tsuag kev loj hlob thiab kev loj hlob. Lawv suav nrog ob qho tib si hluavtaws zoo ib yam li cov tshuaj cog qoob loo thiab cov tshuaj hormones ncaj qha rho tawm los ntawm cov kab mob lom.
PGRs tuaj yeem muab faib ua peb hom raws li lawv txoj haujlwm:
Thawj Qeb: Cog Kev Loj Hlob Promoters
Cov no txhawb nqa cell faib, sib txawv, thiab elongation hauv cov nroj tsuag. Lawv txhim khu kev loj hlob ntawm cov kab mob vegetative thiab cov plab hnyuv siab raum, tiv thaiv cov txiv hmab txiv ntoo poob, txhawb cov cag thiab germination, thiab induce parthenocarpy. Lawv cov kev tswj hwm zoo ib yam li cov tshuaj hormones endogenous xws li auxins, cytokinins, lossis gibberellins. Cov tshuaj txhawb kev loj hlob ntawm cov nroj tsuag muaj xws li indole-3-acetic acid, indole-3-butyric acid, -naphthaleneacetic acid, 6-benzylaminopurine, 4-chlorophenoxyacetic acid, thiab 2,4- dichlorophenoxyacetic acid.
Qeb thib ob: Nroj Tsuag Loj hlob Inhibitors
Cov no inhibit qhov kev loj hlob ntawm apical meristems thiab sprouting, tshem tawm apical dominance kom lateral ceg, thiab tswj cov nroj tsuag. Cov teebmeem ntawm cov nroj tsuag loj hlob inhibitors tsis tuaj yeem thim rov qab los ntawm kev siv gibberellins. Ntau yam tshuaj tua kab mob, thaum siv ntawm qhov qis heev, tuaj yeem ua haujlwm raws li kev loj hlob inhibitors. Lawv cov kev tswj xyuas zoo ib yam li cov tshuaj endogenous cog tshuaj xws li abscisic acid. Feem ntau cov nroj tsuag loj hlob inhibitors muaj xws li txiv neej hydrazide, glyphosate, mepiquat chloride, chlorpropham, daminozide, thiab triiodobenzoic acid.
Qeb thib peb: Cov nroj tsuag loj hlob retardants
Cov no inhibit qhov kev loj hlob ntawm sub-apical meristems, txo internode elongation yam tsis suppressing apical bud loj hlob. Qhov no ua rau luv luv, tuab stems, nce nplooj tuab, thiab cov ntsiab lus chlorophyll ntau dua. Lawv qhov kev ua yog feem ntau los ntawm kev tswj gibberellin synthesis, thiab lawv cov teebmeem tuaj yeem thim rov qab los ntawm kev siv gibberellins. Cov nroj tsuag loj hlob retardants muaj xws li chlormequat, mepiquat chloride, paclobutrazol, daminozide, uniconazole, thiab trinexapac-ethyl.
Qhov zoo ntawm tsob nroj loj hlob Regulators
Ntau yam ntawm Kev Ua thiab Kev Siv: PGRs yog tsim rau yuav luag txhua cov nroj tsuag siab dua thiab qis hauv kev ua liaj ua teb. Los ntawm kev tswj cov txheej txheem physiological xws li photosynthesis, ua pa, nqus thiab thauj, teeb liab transduction, stomatal tus cwj pwm, osmotic siab, thiab transpiration, lawv tswj cov nroj tsuag kev loj hlob thiab kev loj hlob, txhim kho cov nroj tsuag-ib puag ncig kev sib cuam tshuam, txhim kho qoob loo resilience, nce yields, thiab txhim kho cov khoom. zoo.
Tsawg Dosage, Ua nrawm, Ua tau zoo: Feem ntau cov qoob loo tsuas yog xav tau ib daim ntawv thov nyob rau hauv lub sijhawm teem tseg txhua lub caij.
Txoj Cai Bidirectional: PGRs tuaj yeem tswj hwm ob qho tib si sab nraud thiab cov txheej txheem sab hauv lub cev ntawm cov nroj tsuag.