低温胁迫对滇丁香生理效应影响及抗寒性的诱导  

Effect of Low Temperature Stress on Physiological Effect and Resistance Induction on Luculia pinceana

作　　者：孔令芳 杨志愿 李世峰[2] Kong Lingfang;Yang Zhiyuan;Li Shifeng(College of Agriculture and Biology Science,Dali University,Dali,671003;Floriculture Research Institute,Yunnan Academy of Agricultural Sci­ences,Kunming,650205)

机构地区：[1]大理大学农学与生物科学学院,大理671003 [2]云南省农业科学院花卉研究所,昆明650205

出　　处：《分子植物育种》2022年第9期3069-3075,共7页Molecular Plant Breeding

基　　金：云南省教育厅科学研究基金项目(2022J0685)资助。

摘　　要：以滇丁香为试材,在低温胁迫(6℃)下,探究滇丁香生理生化随时间变化的规律及外源激素诱导抗寒性的作用。随着低温胁迫时间的增加,脯氨酸(Pro)含量和相对电导率逐渐增加。丙二醛(MDA)含量和过氧化物酶(POD)活性呈现先升后降的变化趋势,叶绿素含量则持续下降。低温胁迫下,100 mg/L的水杨酸(SA)和1000 mg/L肌醇处理,与对照组相比,减缓了滇丁香的相对电导率的大小、Pro含量和MDA含量增加速度,增加了叶绿素的积累,增强了POD酶的活性,提高了滇丁香的抗寒性,为滇丁香在园林中的应用提供了解决途径。A pot experiment was carried out to study the effects on the physiological indexes and the resistance effect of hormone treatment on Luculia pinceana at low temperature(6℃).The results showed that the contents of proline(Pro)and relative conductivity increased with low temperature stress time.The malondialdehyde(MDA)content,and antioxidant enzyme POD showed a trend of rising first and then decreasing,while the chlorophyll content continued to decline.Under cold stress,100 mg/L of salicylic acid(SA)and 1000 mg/L of inositol treatment slowed the increase rate of relative conductivity size,Pro content,and MDA content,increased chlorophyll accumulation,enhanced POD enzyme activity,and increased its resistance to cold.

关 键 词：滇丁香 低温胁迫 生理生化 抗寒性 

分 类 号：S685.26[农业科学—观赏园艺]