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15d和30d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15d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30d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。
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 30d,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.
出处
《北方园艺》
CAS
北大核心
2014年第2期75-78,共4页
Northern Horticulture
基金
西南林业大学园林植物与观赏园艺云南省重点学科资助项目
关键词
千层金幼苗
水分胁迫
生理指标
Melaleuca bracteata seedlings
water stress
physiological indices
