Effects of Root Zone Temperature on Physiological Characteristics of Pepper Seedlings

doi:10.7668/hbnxb.2014.05.027

Abstract

Abstract: To probe into the sunlight greenhouse soil temperature in the winter stress on crop water content,protective enzymes,osmolyte and membrane permeability in pepper,we comparatively studied three treatment(20-22,14-16,10-12 ℃),the water contents of seedling stems and roots,the activities of super oxede-dismutase(SOD),peroxidase(POD),catalase(CAT),proline(Pro),malondialdehyde(MDA)and electrolytic permeability contents were determined by using Changjin,Xunchi 37-74 and Yunchi 37-82 in pepper.The results showed that as the root zone temperature dropped the seedling water content appeared the tendency of decline,among water content was the lowest in 10-12 ℃ treatment.The activities of SOD,POD and CAT in leaf appeared the trend of decline.The contents of Pro,MDA and electrolytic perme ability appeared the trend of rising.In a word,10-12 ℃ treatment on influencing degree of water content,physiological and biochemical characteristics in pepper seedlings was significantly higher than 20-22,14-16 ℃ treatments.Taking physiological and biochemical characteristics as measurement index,we concluded that pepper could still keep its normal growth and development when the root zone temperature over 14 ℃.

Key words: The root zone temperature, Pepper, Seedling, Physiological characteristics

CLC Number:

S641.3

LIAN Yong, CUI Shi-mao, BAO Xiu-xia, WANG Bao-sheng. Effects of Root Zone Temperature on Physiological Characteristics of Pepper Seedlings[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2014, 29(5): 156-160. doi: 10.7668/hbnxb.2014.05.027.

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