本文關(guān)鍵詞： 鉛脅迫 蘿卜芽苗菜 內(nèi)源激素　出處：《北方園藝》2016年24期 　論文類型：期刊論文

【摘要】：以蘿卜芽苗菜為試材,探討了在不同濃度鉛(100、300、500mg·L~(-1))脅迫下,4種內(nèi)源植物激素(玉米素(ZR)、脫落酸(ABA)、赤霉素(GA3)、吲哚乙酸(IAA))以及IAA/ABA、GA3/ABA的動態(tài)變化。結(jié)果表明:ZR含量隨鉛濃度的升高而下降。ABA隨著鉛濃度的升高呈現(xiàn)出先下降后上升趨勢,GA3含量則呈現(xiàn)出先上升后下降的趨勢,在鉛濃度為300mg·L~(-1)時達到最大值。IAA與GA3變化趨勢保持一致,在鉛濃度升高的條件下,含量先升后降,在鉛濃度100mg·L~(-1)時達到峰值;生長促進類激素與衰老促進型激素的比值如IAA/ABA、GA3/ABA也隨著鉛濃度的升高,呈現(xiàn)出先上升后下降的趨勢。表明鉛脅迫能改變蘿卜芽苗菜內(nèi)源植物激素含量,進而調(diào)控蘿卜植株的生長。
[Abstract]:Four endogenous plant hormones (zeaxanthin ZRR) were studied under the stress of different concentrations of lead 100 (300mg 路L ~ (-1) ~ (-1)). Abscisic acid (Aba), gibberellin (GA3), indoleacetic acid (IIA) and IAA/ABA. The dynamic change of GA3/ABA. The results showed that the content of GA3/ABA decreased with the increase of lead concentration. The content of GA3/ABA decreased first and then increased with the increase of lead concentration. The content of GA3 increased at first and then decreased, and reached the maximum value at the concentration of 300mg 路L ~ (-1). It was consistent with the change trend of GA3, under the condition of increasing lead concentration. The content increased first and then decreased, and reached the peak at 100 mg 路L ~ (-1) lead concentration. The ratio of growth-promoting hormone to senescence-promoting hormone such as IAA / ABA / GA _ 3 / ABA also increased with the increase of lead concentration. The results showed that lead stress could change the content of endogenous plant hormones and then regulate the growth of radish plants.
【作者單位】： 中南林業(yè)科技大學(xué)生命科學(xué)與技術(shù)學(xué)院;
【基金】：湖南省教育廳科學(xué)研究資助項目(16C1677) 中南林業(yè)科技大學(xué)大學(xué)生創(chuàng)新性資助項目(ZNL2016(8)-088)
【分類號】：X503.231
【正文快照】： 隨著城市化和工業(yè)化進程的加快以及含鉛汽油的使用,大量鉛被排放到環(huán)境中,當(dāng)植物通過土壤吸收大量重金屬鉛后,其體內(nèi)代謝過程會發(fā)生紊亂,如植物葉片光合強度及蒸騰速率降低,進而對生長發(fā)育造成影響,甚至導(dǎo)致植物死亡[1-3]。植物激素是自身體內(nèi)產(chǎn)生的一種極微量的非營養(yǎng)性物質(zhì),，

本文編號：1450006