S-abscisic Acid yog ib qho ntshiab, ib txwm muab los ntawm cov nroj tsuag kev loj hlob regulator muaj peev xwm txhim kho drought tsis kam thiab chaw nyob hauv pobkws. Tsis tas li ntawd, nws pab txhawb kev nce qoob loo los ntawm kev tswj hwm kev loj hlob ntawm cov nroj tsuag, txo qis pob ntseg tso, thiab txhim kho cov qoob loo zoo.
Ua raws li cov nroj tsuag "kev ntxhov siab-inducible factor," cov khoom no sai sai ua rau ABA-raws li kev taw qhia txoj hauv kev thaum pob kws ntsib kev nyuaj siab. Qhov kev ua kom no ua rau lub hauv paus kaw kom txo tau cov dej hloov pauv thaum tib lub sijhawm txhawb kev nkag mus tob hauv cov hauv paus hniav thiab txhim kho cov dej muaj peev xwm. Cov kev tshawb fawb qhia tau hais tias kev kho mob nrog ib qho concentration ntawm 2-3 mg·kg⁻¹ tuaj yeem ua rau kom cov nroj tsuag qhov siab, cov hauv paus hniav ntev, thiab catalase kev ua ntawm cov pob kws, yog li ntxiv dag zog rau lawv lub hauv paus rau kev tiv thaiv drought.
Hais txog qhov chaw nyob tsis kam, daim ntawv thov exogenous ntawm S-abscisic Acid inhibits ntau internode elongation nyob rau hauv qia, txhim kho vascular pob, thiab txhim kho qia txhua yam muaj zog. Nws cov txheej txheem ntawm kev ua haujlwm suav nrog kev tswj hwm qhov sib npaug ntawm endogenous gibberellins thiab auxins, yog li ua tiav qhov xav tau "kev loj hlob- tswj" (tiv thaiv kev loj hlob). Tsis tas li ntawd, S-abscisic Acid optimizes cog architecture los ntawm kev txo qis qhov siab ntawm pob ntseg tso; Qhov no ua rau cov nroj tsuag qhov chaw nruab nrab ntawm lub ntiajteb txawj nqus nqes, txo qhov kev pheej hmoo ntawm chaw nyob thaum huab cua los yog los nag.
Nyob rau hauv cov nqe lus ntawm kev txhim kho zoo thiab yield nce, S-abscisic Acid tswj qhov sib npaug ntawm kev loj hlob thiab kev loj hlob ntawm cov me nyuam, ua kom yooj yim rau translocation ntawm photosynthetic khoom rau cov nplej. Cov txheej txheem no ua rau muaj kev nce ntxiv ntawm cov nplej ib pob ntseg thiab ib txhiab-grain hnyav. Kev sim teb tau pom tias qhov kev txiav txim siab ntawm S-abscisic Acid tuaj yeem txhawb cov qoob loo qoob loo ntau dua 5%, thaum tseem txhim kho cov qoob loo plumpness thiab ntsuas qhov hnyav, thiab txo qhov tshwm sim ntawm pwm.
Cov tswv yim siv tswv yim:
Seed Dressing/Soaking: Soaking noob nyob rau hauv ib tug 0.3-0.5 mg/L S-abscisic Acid tov rau 6-12 teev yuav txhim khu germination tus nqi thiab txhim khu cov yub-theem kev nyuaj siab.
Kev Loj Hlob (Anti-overgrowth) ntawm Seedling Stage: Foliar application of a 1-2 ppm solution during the 6-8 leaf stage can effectively inhibit internode elongation and lower the ear placement.
Lub Sijhawm Kev Nyuaj Siab Tseem Ceeb: Siv 50-100 ppm tshuaj los ntawm kev txau thaum lub sij hawm sib koom ua ke, lossis 3-5 hnub ua ntej kev cia siab tias yuav muaj kev kub ntxhov los yog qhov kub thiab txias, los txhawb cov nroj tsuag tag nrho cov kev ntxhov siab.
