Kohli Sukhmeen Kaur, Handa Neha, Sharma Anket, Kumar Vinod, Kaur Parminder, Bhardwaj Renu
Department of Botanical and Environmental Sciences, Guru Nanak Dev University , Amritsar , India.
Department of Botany, DAV University , Sarmastpur, Jalandhar , India.
Turk J Biol. 2017 Dec 18;41(6):943-953. doi: 10.3906/biy-1707-15. eCollection 2017.
Lead (Pb) has wide-ranging effects on various essential physiological processes in plants including seed germination, root/ shoot growth, photosynthetic efficiency, water status, and activities of enzymes. The effect of combined treatment of 24-epibrassinolide (10-7 M, EBL) and salicylic acid (1 mM, SA) on growth, photosynthetic attributes, and phenolic compounds in 30-, 60-, and 90-day-old plants of Brassica juncea L. under Pb stress (0.25 mM, 0.50 mM, and 0.75 mM) were studied. It was observed that Pb toxicity resulted in lowered growth and photosynthetic efficiency. The expressions of CHLASE, PSY, CHS, and PAL genes were altered. Presoaking treatment with the combination of EBL and SA for metal-stressed plants mitigated the adverse effects of metal stress by improving growth and levels of pigment and phenolic compounds.
铅（Pb）对植物的各种重要生理过程具有广泛影响，包括种子萌发、根/茎生长、光合效率、水分状况以及酶的活性。研究了在铅胁迫（0.25 mM、0.50 mM和0.75 mM）下，24-表油菜素内酯（10-7 M，EBL）和水杨酸（1 mM，SA）联合处理对30日龄、60日龄和90日龄芥菜型油菜生长、光合特性和酚类化合物的影响。观察到铅毒性导致生长和光合效率降低。CHLASE、PSY、CHS和PAL基因的表达发生了改变。对金属胁迫植物进行EBL和SA组合的预浸处理，通过改善生长以及色素和酚类化合物水平，减轻了金属胁迫的不利影响。
