水分胁迫对黑壳楠和香樟幼苗生理特性的影响

【目的】比较黑壳楠和香樟幼苗在淹水和干旱胁迫下的抗性指标,为筛选抗涝和抗旱型绿化植被提供参考依据。【方法】采用双套盆法对2年生黑壳楠和香樟幼苗进行重度淹水（W1）、中度淹水（W2）、轻度淹水（W3）、对照（W4）、持续干旱（W5）共5个处理的水分胁迫试验,分别于处理后10、20、30和40 d测定黑壳楠和香樟幼苗叶片的各项生理指标。【结果】淹水胁迫下,黑壳楠和香樟幼苗叶片相对电导率均随胁迫程度的加强而增加;香樟幼苗MDA含量随胁迫程度的加强而增加,黑壳楠在轻度、中度淹水30 d后,MDA含量呈下降趋势;香樟幼苗SOD活性随胁迫时间的延长呈先升后降趋势,黑壳楠在轻度、中度淹水胁迫下SOD活性始终...

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Bibliographic Details
Published in南方农业学报 Vol. 46; no. 8; pp. 1449 - 1454
Main Author 杨曼 张佑麟 徐振东 刘刚 费永俊
Format Journal Article
LanguageChinese
Published 长江大学楠木种质资源评价及创新中心,湖北荆州,434025 2015
Subjects
MDA
SOD
水分胁迫
相对电导率
香樟
黑壳楠
黑壳楠
相对电导率
C.camphora(L.) Presl
香樟
L.megaphylla Hemsl
water stress
SOD
MDA
relative electrical conductivity
水分胁迫
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Summary:【目的】比较黑壳楠和香樟幼苗在淹水和干旱胁迫下的抗性指标,为筛选抗涝和抗旱型绿化植被提供参考依据。【方法】采用双套盆法对2年生黑壳楠和香樟幼苗进行重度淹水（W1）、中度淹水（W2）、轻度淹水（W3）、对照（W4）、持续干旱（W5）共5个处理的水分胁迫试验,分别于处理后10、20、30和40 d测定黑壳楠和香樟幼苗叶片的各项生理指标。【结果】淹水胁迫下,黑壳楠和香樟幼苗叶片相对电导率均随胁迫程度的加强而增加;香樟幼苗MDA含量随胁迫程度的加强而增加,黑壳楠在轻度、中度淹水30 d后,MDA含量呈下降趋势;香樟幼苗SOD活性随胁迫时间的延长呈先升后降趋势,黑壳楠在轻度、中度淹水胁迫下SOD活性始终呈上升趋势。干旱胁迫下,黑壳楠幼苗叶片的相对电导率在处理后40 d前呈下降趋势,40 d后呈上升趋势,而香樟在处理后30 d前无明显变化,30 d后上升;黑壳楠幼苗MDA含量在处理后40 d前呈下降趋势,40 d后呈上升趋势,而香樟幼苗MDA含量在处理后30 d前下降,而后上升;黑壳楠幼苗SOD活性均呈上升趋势,而香樟呈先升后降再升的变化趋势。【结论】黑壳楠幼苗能适应轻度、中度淹水环境,且抗旱性高于香樟幼苗,更适宜在我国干旱和多雨地区园林绿化中推广种植。
Bibliography:YANG Man, ZHANG You-lin, XU Zhen-dong, LIU Gang, FEI Yong-jun （Germplasm Resources Evaluation and Innovation Center of Phoebe Zhennan S. Lee, Yangtze University, Jingzhou, Hubei 434025, China）
45-1381/S
Objective】The present experiment was conducted to investigate resistance index of Cinnamomum camphora（L.） Presl. and Lindera megaphylla Hemsl under waterlog and drought stress, in order to provide basis for screening antiwaterlogging and drought-resistant vegetation for environmental virescence. 【Method】The 2-year-old seedlings of L. megaphylla Hemsl. and C. camphora（L.） Presl. were cultured with clay pots in plastic buckets, respectively, which were used to conduct water stress experiment including with 5 treatments viz., severe waterlog, moderate waterlog, mild waterlog,normal water supply（control） and persistent drought. Then the physiological indexes of L. megaphylla Hemsl. and C. camphora（L.） Presl. seedlings were determined on the 10, 20, 30 and 40 days after treatment. 【Result】Under waterlog stress,with t
ISSN:2095-1191
DOI:10.3969/j:issn.2095-1191.2015.08.1449