SONG Jinliang,ZHU Lei,WANG Zhen,et al.Effects of Low Temperature and Weak Light on Growth and Physiological Index of Cucurbita pepo L.[J].Northern Horticulture,2017,41(01):13-17.[doi:10.11937/bfyy.201701004]
低温弱光胁迫对西葫芦幼苗生长指标的影响
- Title:
- Effects of Low Temperature and Weak Light on Growth and Physiological Index of Cucurbita pepo L.
- 文献标志码:
- A
- 摘要:
- 以“珍玉8号”和“珍玉10号”2个西葫芦品种为试材，采用4种不同的温光组合进行低温弱光和恢复处理，研究低温弱光和恢复过程中西葫芦生理指标的变化。结果表明：低温弱光条件下，随着光照和温度的降低，西葫芦株高、茎粗、叶面积的增长量及西葫芦叶片中可溶性蛋白质含量和超氧化物歧化酶（SOD）活性均有不同程度的降低；而可溶性糖含量和过氧化物酶（POD）活性整体升高；恢复后发现，适当的低温（15 ℃/8 ℃）和弱光（30 μmol?m-2?s-1）对植株〖JP2〗的生长影响不大，低温（15 ℃/8 ℃）强光（60 μmol?m-2?s-1）和过高的胁迫强度（10 ℃/5 ℃、30 μmol?m-2?s-1)会显著抑制西葫芦的生理生化变化。其中“珍玉10号”对低温弱光的适应性和恢复力均强于“珍玉8号”；综上所述，过低的温度和弱光严重影响西葫芦的生长发育，该试验中低温（15 ℃/8 ℃）和弱光（30 μmol?m-2?s-1）是最佳处理。
- Abstract:
- This experiment selected two different squash seedlings ‘Zhenyu 10’ and ‘Zhenyu 8’ as materials，four kinds of combinations under low temperature and weak light conditions were set，the purpose was to study the change of growth and physiological characteristics of Cucurbita pepo L.seedlings under different low temperature and weak light，and discover effects mechanism of low temperature and weak light on plant growth and physiological characteristics and adaptation mechanism of Cucurbita pepo L.seedlings.The results showed that after treatment with low temperature and weak light，when temperature and light reduced，the increment of plant height，stem diameter，leaf area and the activity of SOD，the content of protein also reduced.In various degree under low temperature and weak light，the content of soluble sugar and POD activity increased.After the low temperature low light recovered，it had a little effects on the growth of squash seedlings at proper low temperature（15 ℃/8 ℃）and weak light（30 μmol?m-2?s-1），but when it to low temperature (15 ℃/8 ℃) high light (60 μmol?m-2?s-1) and high stress intensity (10 ℃/5 ℃,30 μmol?m-2?s-1)could significantly inhibit the physiological and biochemical changes.The changing and recovery of each parameters of ‘Zhenyu 10’ were both better than ‘Zhenyu 8’，so dose the adaptability and resilience on chilling under low light.In conclusion,too much low temperature and weak light would inhibit the growth of Cucurbita pepo L.seedlings.In this test,the treatment of low temperature（15 ℃/8 ℃）and weak light（30 μmol?m-2?s-1）was the best for Cucurbita pepo L.seedlings to recover.
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备注/Memo
第一作者简介：宋金亮（1991-），男，河南周口人，硕士研究生，研究方向为蔬菜育种。Email:1149420467@qq.com.责任作者：孙守如（1963-），男，河南封丘人，教授，硕士生导师，现主要从事蔬菜种质资源创新和新品种选育等研究工作。基金项目：河南省科技攻关计划资助项目（152102110065）。