Influences of Low Temperature Stress on Pepper′s Growth Index and Physiological Index

doi:10.7668/hbnxb.2010.02.034

Abstract

Abstract: Our facility pepper cultivation area increased,so our current varieties were used to study their resistance to cold conditions to provide reference for the facilities pepper cultivation.In this experiment,we use the variety of Jin pepper No.1,Baojiao F1 generation,Liangjiao 2313,Zhongjiao 22 to determine their growth index and physiological index(Soluble sugar content,proline content,POD activity,SOD activity,root activity,chlorophyll content,malondialdehyde content)under the temperature of 15℃/5℃(day/night);20℃/10℃(day/night);25℃/15℃(day/night).The results showed that the growth index,the dry matter content,root activity,chlorophyll content,SOD activity had decreased,when the temperature increased,the Soluble sugar content,proline content,POD activity,malondialdehyde content gradually increased.The changes of physiological index before and after the treatments show that the index are closely related to pepper's cold-resistance ability.The four pepper cultivars,according to various indicators of cold resistance were listed in an order.Liangjiao 2313,Zhongjiao 22,Jin pepper No.1,Baojiao F1 generation.

Key words: Pepper, Low temperature, Growth index, Physiological index, Cold resistance

CLC Number:

S641.01

CHAI Wen-chen, MA Rong-li, JIAO Yan-sheng, XING Guo-ming. Influences of Low Temperature Stress on Pepper′s Growth Index and Physiological Index[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2010, 25(2): 168-171. doi: 10.7668/hbnxb.2010.02.034.

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