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NaCl胁迫对茄子幼苗生理指标的影响
张玲,王华,徐强,周静
0
(安徽农业大学园艺学院,合肥 230036)
摘要:
以茄子幼苗为材料,研究不同浓度(0、50、100、150和200 mmol·L-1)NaCl胁迫对其幼苗叶片膜透性、MDA含量、抗氧化酶(SOD、POD和CAT)活性、叶绿素含量及叶绿素荧光参数的影响。结果表明:随着NaCl浓度的增加,茄子幼苗叶片质膜相对透性及MDA含量升高,抗氧化酶(CAT、SOD和POD)活性呈现先升后降的趋势;叶绿素含量下降;叶绿素荧光参数(F0NPQ)比对照升高,参数(Fv/FmqPФPSⅡETR)均比对照下降。NaCl胁迫对茄子幼苗一些生理特性有一定影响,低浓度(50 mmol·L-1)NaCl处理对茄子植株无明显影响;高浓度(150、200 mmol·L-1)NaCl处理,植株逐渐表现出盐害症状,且随着处理时间的延长和处理浓度的增加盐害程度加重。
关键词:  NaCl胁迫  茄子  生理指标  叶绿素荧光
DOI:10.13610/j.cnki.1672-352x.20141029.029
投稿时间:2014-06-23
基金项目:安徽省自然科学基金(1208085QC54), 安徽农业大学青年科学基金重点项目(2011zb006), 安徽农业大学稳定和引进人才科研项目(yi2011-38)共同资助。
Effects of NaCl stress on physiological indexes of eggplant seedlings
ZHANG Ling,WANG Hua,XU Qiang,ZHOU Jing
(School of Horticulture, Anhui Agricultural University, Hefei 230036)
Abstract:
Effects of NaCl at 0, 50, 100, 150, and 200 mmol·L-1 on membrane permeability, MDA content, activities of antioxidant enzymes (SOD, POD and CAT), chlorophyll content, and chlorophyll fluorescence parameters of eggplant seedlings were investigated. The results showed that with the increasing NaCl concentration, the plasma membrane relative permeability and malondialdehyde (MDA) were increasing. The activities of CAT, SOD, and POD first increased and then decreased, while the chlorophyll content decreased gradually. In chlorophyll fluorescence parameters, F0 and NPQ increased, while Fv/Fm, qP, ФPSⅡ and ETR decreased compared to the control group. The results indicated that the physiological characteristics of eggplant seedlings were affected by the NaCl stress. Under the low concentration of NaCl (50 mmol·L-1), no significant differences between the treatment and the control were observed. Under the high concentration of NaCl (150 and 200 mmol·L-1), the symptom of salt injury was gradually appeared on eggplant seedlings. Furthermore, the injury was intensified with the increase of treatment time and concentration of NaCl.
Key words:  NaCl stress  eggplant  physiological indexes  chlorophyll fluorescence

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