Department of Botany and Microbiology, College of Science, King Saud University, Riyadh, Saudi Arabia; Plant Physiology Section, Department of Botany, Aligarh Muslim University, Aligarh 202002, Uttar Pradesh, India.
Plant Physiology Section, Department of Botany, Aligarh Muslim University, Aligarh 202002, Uttar Pradesh, India.
Int J Biol Macromol. 2014 Mar;64:130-6. doi: 10.1016/j.ijbiomac.2013.11.021. Epub 2013 Dec 1.
This study examines the impact of 28-homobrassinolide (HBL) in alleviating the effects of cadmium (Cd) and salinity (NaCl) on wheat plants solely and against the synergy. The surface sterilized seeds of Triticum aestivum cv. PBW-373 were sown in the soil amended either with salinity or cadmium or both. The foliage in was sprayed at 20d after sowing (DAS) both in stressed and non-stressed plants. The spray of HBL at 20 DAS increased almost all the parameters while decreased the H2O2 content and lipid peroxidation in the leaves. The presence of cadmium and/or salinity decreased the values for all the growth and photosynthetic parameters but improved the activity of antioxidant enzymes and proline content in 30d old plants. However, the ill effects observed under NaCl and/or Cd treatment were completely overcomed by the spray of HBL to the plants at 20d stage. The spray of HBL to stressed plants further increased the antioxidant enzyme activities and proline content thereby giving tolerance to the plants against the stress.
本研究考察了 28-高油菜素内酯（HBL）对小麦植株单独缓解镉（Cd）和盐度（NaCl）影响以及协同缓解作用。将经表面消毒的 PBW-373 小麦品种种子播种在添加盐度或镉或两者的土壤中。在播种后 20 天（DAS），对受胁迫和非胁迫植物的叶面进行 HBL 喷雾。HBL 在 20 DAS 的喷雾几乎增加了所有参数，同时降低了叶片中的 H2O2 含量和脂质过氧化作用。镉和/或盐度的存在降低了所有生长和光合参数的值，但在 30 天时提高了抗氧化酶的活性和脯氨酸含量。然而，在 NaCl 和/或 Cd 处理下观察到的不良影响，通过在 20 天阶段向植物喷洒 HBL 得到了完全克服。向胁迫植物喷洒 HBL 进一步增加了抗氧化酶的活性和脯氨酸的含量，从而使植物对胁迫具有耐受性。
