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为探讨外源硫化氢对盐胁迫下板栗幼苗的缓解作用,以两年生红栗2号板栗幼苗为试材,研究不同浓度(0、0.1、0.2、0.5、1.0、2.0mmol/L)的硫化氢供体硫氢化钠(Na HS)对100mmol/L Na Cl胁迫下板栗幼苗叶片光合、叶绿素含量、脯氨酸含量及丙二醛(MDA)含量的影响。结果表明:喷施外源Na HS可不同程度缓解盐胁迫对板栗幼苗叶片造成的伤害,与100mmol/L Na Cl胁迫处理相比,叶绿素含量提高,MDA含量降低,脯氨酸含量升高,从而有效降低了盐胁迫下细胞膜受损程度,提高了板栗对盐渍环境的适应性,且这种缓解效应存在明显的剂量效应,以0.5、1.0 mmol/L Na HS两个浓度效果较好。
In order to investigate the alleviating effect of exogenous hydrogen sulfide on chestnut seedlings under salt stress, two-year old chestnut chestnut seedlings of Hongli 2 were used as materials to study the effects of different concentrations (0,0.1,0.2,0.5,1.0,2.0mmol / L) Effects of Hydrogen Donor NaHS on Photosynthesis, Chlorophyll Content, Proline Content and Malondialdehyde (MDA) Content of Chestnut Seedling Leaves under 100 mmol / L NaCl Stress. The results showed that exogenous Na HS could alleviate the damage caused by salt stress on leaves of chestnut seedlings to varying degrees. Compared with 100 mmol / L NaCl stress, chlorophyll content increased, MDA content decreased and proline content increased Effectively reducing the damage of cell membrane under salt stress and improving the adaptability of Chinese chestnut to saline environment. The mitochondrial effect of this effect has obvious dose effect, and the effects of two concentrations of 0.5 and 1.0 mmol / L NaHS are better.