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Effects of Low Temperature and Weak Light on Growth and Physiological Index of Cucurbita pepo L.(PDF)

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Issue:
2017年01
Page:
13-17
Research Field:
Publishing date:

Info

Title:
Effects of Low Temperature and Weak Light on Growth and Physiological Index of Cucurbita pepo L.
Author(s):
SONG Jinliang; ZHU Lei; WANG Zhen; WANG Linzhong; SUN Shouru
(College of Horticulture，Henan Agricultural University，Zhengzhou，Henan 450002)
Keywords:
low temperature and weak light; Cucurbita pepo L.; growth; physiological index
PACS:
-
DOI:
10.11937/bfyy.201701004
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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Last Update: 2017-03-10