AI Xing- mei,YANG Yue,XU Yong- yan,et al.Dynamic Responses of Part Physiological Indices Under Water Stress in Melaleuca bracteata Seedling Stage[J].Northern Horticulture,2014,38(02):75-78.
千层金幼苗部分生理指标对水分胁迫的响应
- Title:
- Dynamic Responses of Part Physiological Indices Under Water Stress in Melaleuca bracteata Seedling Stage
- 文章编号:
- 1001-0009（2014）02-0075-04
- 分类号:
- S 687.2
- 文献标志码:
- A
- 摘要:
- 以千层金幼苗为试材，采用盆栽模拟试验，研究了千层金幼苗对不同梯度水分胁迫15 d和30 d的生理响应。结果表明：不同处理的植株与供水充足的对照（CK）相比，水分胁迫15 d内植株在形态上没有太大的差异，随着胁迫程度的加剧和时间的延长，即水分胁迫30 d时，重度胁迫下的植株在长势上表现为矮小特征，叶片出现萎蔫现象；叶片含水量和叶绿素含量呈逐渐降低的趋势；脯氨酸（Pro）含量和丙二醛(MDA)含量逐渐上升，超氧化物歧化酶(SOD)活性呈先升后降的趋势。表明千层金幼苗对水分胁迫有一定的抗性，随着胁迫强度的增加抗性降低。
- Abstract:
- Taking Melaleuca bracteata seedlings as material,the physiological responses under the different gradient of water stress 15 d and 30 d by pot experiment were studied.The results showed that all of the treated plants had not obvious differences in morphological traits compared with the control (CK) which had provided sufficient water within 15 days.With the increased of water stress and time continued,up to 30 d,the plant appeared the dwarf characteristics and leaf wilting under the severe stress；in addition,the leaf water content and chlorophyll content decreased gradually;Pro and MDA contents had continuously increased and the SOD activity went up at first and then fell down.From above conclusion showed that Melaleuca bracteata seedlings had a certain resistance to the water stress,and with the stress intensity increased,the resistance decreased.
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备注/Memo
第一作者简介：艾星梅（1984- ），女，云南保山人，博士，讲师，现主要从事植物生理和育种等研究工作。E-mail:aixmei84@163.com.