[1]李畅,苏家乐,刘晓青,等.旱涝交替胁迫对杜鹃花生理特性的影响[J].江苏农业学报,2019,(02):412-419.[doi:doi:10.3969/j.issn.1000-4440.2019.02.023]
 LI Chang,SU Jia-le,LIU Xiao-qing,et al.Effects of alternate flooding and drought stress on physiological characteristics in azalea[J].,2019,(02):412-419.[doi:doi:10.3969/j.issn.1000-4440.2019.02.023]
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旱涝交替胁迫对杜鹃花生理特性的影响()
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江苏农业学报[ISSN:1006-6977/CN:61-1281/TN]

卷:
期数:
2019年02期
页码:
412-419
栏目:
园艺
出版日期:
2019-04-30

文章信息/Info

Title:
Effects of alternate flooding and drought stress on physiological characteristics in azalea
作者:
李畅苏家乐刘晓青何丽斯肖政陈尚平
(江苏省农业科学院休闲农业研究所/江苏省高效园艺作物遗传改良重点实验室,江苏南京210014)
Author(s):
LI ChangSU Jia-leLIU Xiao-qingHE Li-siXIAO ZhengCHEN Shang-ping
(Institute of Leisure Agriculture, Jiangsu Academy of Agricultural Sciences/Jiangsu Key Laboratory for Horticultural Crop Genetic Improvement, Nanjing 210014, China)
关键词:
杜鹃花旱涝交替胁迫生理特性
Keywords:
azaleaalternative stress of drought and floodingphysiological characteristics
分类号:
S685.21
DOI:
doi:10.3969/j.issn.1000-4440.2019.02.023
文献标志码:
A
摘要:
以对旱涝交替胁迫敏感性不同的2个杜鹃花品种为材料,通过对其旱涝交替胁迫下光合参数、丙二醛(MDA)含量、细胞膜相对透性、渗透调节物质及保护酶活性等的测定,研究旱涝交替胁迫对杜鹃花生理特性的影响。结果表明,旱涝交替胁迫下,2个杜鹃花品种叶片净光合速率(Pn)、蒸腾速率(Tr)、气孔导度(Gs)、水分利用率(WUE)、PSII最大光化学效率(Fv/Fm)均较处理前显著下降。随着旱涝交替胁迫时间的延长,MDA含量、细胞膜相对透性、脯氨酸(Pro)含量呈上升趋势,可溶性糖含量、POD、CAT活性则先上升后下降。与抗性强的杜鹃花品种状元红相比,敏感品种琉球红在旱涝交替胁迫下Pn、Tr、Gs、WUE、Fv/Fm、叶绿素含量下降幅度大,SOD、POD、CAT活性、Pro和可溶性糖含量增加幅度小,MDA含量、细胞膜相对透性增加幅度大。状元红在旱涝交替胁迫下能保持叶绿素含量的稳定,维持一定水平的净光合速率和水分利用率,保持膜系统处于相对完好的状态,能保持较高的抗氧化酶活性以清除活性氧,保持较高的脯氨酸含量以维持渗透调节系统的稳定性是其抗性强的部分原因。
Abstract:
In order to study the physiological response mechanism of azalea under alternative stress of drought and flooding, the photosynthetic parameters, malondialdehyde (MDA) content, relative permeability of cell membrane, organic osmoregulation substances and antioxidant enzyme activities were analyzed by using two azalea cultivars with different sensitivity to alternate flooding and drought stress. The results showed that the net photosynthetic rate (Pn), transpiration rate (Tr), stomatal conductance (Gs), water use efficiency (WUE) and PSII maximum photochemical efficiency (Fv/Fm) were significantly decreased under alternative stress of drought and flooding. With the prolongation of alternate drought and flooding stress, the relative permeability of cell membrane, MDA and proline (Pro) content increased, while the soluble sugar content, POD activity and CAT activity increased first and then decreased. Compared with those of high resistance azalea cultivar Zhuangyuanhong, the Pn, Tr, Gs, WUE, Fv/Fm and chlorophyll content of azalea cultivar Liuqiuhong decreased greatly under alternative stress of drought and flooding, while the activities of SOD, POD and CAT, Pro and soluble sugar content increased slightly, the relative permeability of cell membrane and MDA content increased greatly. The high resistance of Zhuangyuanhong under alternative stress of drought and flooding was partly due to its ability to keep the stability of chlorophyll content, maintain Pn and WUE at a certain level, keep membrane system in relatively perfect working order, maintain the higher antioxidant enzyme activities and Pro content.

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备注/Memo

备注/Memo:
收稿日期:2018-07-17 基金项目:国家科技支撑计划项目(2013BAD01B070403);江苏省自然科学基金项目(BK2012789);江苏省林业科技创新与推广项目[lykj(2017)48];南京市科技计划项目(20176033) 作者简介:李畅(1982-),女,内蒙古乌兰浩特人,硕士,副研究员,主要从事观赏植物种质资源与遗传育种研究。(Tel)025-84390223;(E-mail)changli529@foxmail.com 通讯作者:苏家乐,(Tel)025-84391218;(E-mail)sujl66@aliyun.com
更新日期/Last Update: 2019-05-05