摘要
用Hogland营养液水培1 a生"嘎拉"苹果幼苗为材料,研究了在培养液中加入0.5%(W/V)甲壳素对PEG(20%)诱导的水分胁迫条件下叶片光合参数、活性氧和脯氨酸含量的影响。结果表明:甲壳素可以有效提高叶片的净光合速率,提高叶片气孔导度,增强叶片的蒸腾作用,缓解了由于干旱胁迫对光合作用的影响。研究发现,培养液中加入甲壳素的水分胁迫使植株叶片的叶绿素的含量明显高于对照,过氧化氢含量明显低于对照。
To studying the effects of chitin on photosynthesis and anti-stress of drying in leaves of water stressedmicropropagated apple （Malus purnila Mill. ） plants, water stress system ot one-year-olo micropropagated apple plants were subjected to water stress by regulating the osmotic potential of the solution using polyethylene glycol （PEG-6000, 20%W/V）and 0. 5% （W/V） chitin in the experiment. Water stress （WS） increased the content of H2O2 sharply in the leaves in the second day, but the content of H2O2 in water stress with Chitin （WS-CHI） increased slowly. Content of Proline in leaves of water stress with chitin （WS-CHI） increased significantly than that in water stress （WS）. There was significantly difference in content of Proline and H2O2 in leaves between WS-CHI and CK,and there was significantly difference between WS and WS-CHI too. The photosynthesis in WS was significantly lower than that of WS-CHI, There was no significantly different in photosynthesis between WS-CHI and CK.
出处
《北方园艺》
CAS
北大核心
2007年第11期19-22,共4页
Northern Horticulture
