Respiratory Response of Dormant Nectarine Vegetative Buds to High Temperature Stress

doi:10.1016/S2095-3119(13)60207-5

Journal of Integrative Agriculture ›› 2013, Vol. 12 ›› Issue (1): 80-86.DOI: 10.1016/S2095-3119(13)60207-5

Respiratory Response of Dormant Nectarine Vegetative Buds to High Temperature Stress

TAN Yue, LI Ling, LENG Chuan-yuan, LI Dong-mei, CHEN Xiu-de, GAO Dong-sheng

National Research Center for Apple Engineering and Technology/State Key Laboratory of Crop Biology/College of Horticulture Science and Engineering, Shandong Agricultural University, Tai’an 271018, P.R.China

收稿日期:2011-08-11 出版日期:2013-01-01 发布日期:2013-01-24
通讯作者: Correspondence GAO Dong-sheng,Tel: +86-538-8249659, Fax: +86-538-8242364, E-mail: dsgao@sdau.edu.cn
作者简介:TAN Yue, Tel: +86-538-8246116, E-mail: tanyue0536@163.com; LI Ling, Tel: +86-538-8246116, E-mail: lilingsdau@163.com;
基金资助:
This work was supported by the the Key Technologies R&D Program of China during the 12th Five-Year Plan period (2011BAD12B02).

Respiratory Response of Dormant Nectarine Vegetative Buds to High Temperature Stress

TAN Yue, LI Ling, LENG Chuan-yuan, LI Dong-mei, CHEN Xiu-de, GAO Dong-sheng

National Research Center for Apple Engineering and Technology/State Key Laboratory of Crop Biology/College of Horticulture Science and Engineering, Shandong Agricultural University, Tai’an 271018, P.R.China

Received:2011-08-11 Online:2013-01-01 Published:2013-01-24
Contact: Correspondence GAO Dong-sheng,Tel: +86-538-8249659, Fax: +86-538-8242364, E-mail: dsgao@sdau.edu.cn
About author:TAN Yue, Tel: +86-538-8246116, E-mail: tanyue0536@163.com; LI Ling, Tel: +86-538-8246116, E-mail: lilingsdau@163.com;
Supported by:
This work was supported by the the Key Technologies R&D Program of China during the 12th Five-Year Plan period (2011BAD12B02).

摘要/Abstract

摘要： High temperature stress (HT) is efficient in breaking endo-dormancy of perennial trees. The effects of HT (50°C) on the respiration of dormant nectarine (Prunus persica var. nectariana cv. Shuguang) vegetative buds were evaluated in the research. We found that bud respiration was transiently inhibited by HT and the pentose phosphate pathway (PPP) and the cytochrome C pathway (CYT) were significantly affected. On the substrate level, PPP was activated in the HT-treated buds compared with the control group. However, the activation did mot occur until hours after HT treatment. The tricarboxylic acid cycle (TCA) in both the HT-treated buds and in the control group proceeded at a low level most of the time compared with total respiration. On the electron transfer level, CYT was transiently inhibited by HT but became significantly active in the later stage. CYT operation in the control group exhibited an attenuation process. The alternative pathway (ALT) fluctuated both in the HT-treated samples and in the control. The results suggest that the temporary CYT inhibition and the following PPP activation may be involved in HT-induced bud dormancy release and budburst mechanisms.

关键词: high temperature stress , dormancy release , respiration , nectarine , vegetative buds

Abstract: High temperature stress (HT) is efficient in breaking endo-dormancy of perennial trees. The effects of HT (50°C) on the respiration of dormant nectarine (Prunus persica var. nectariana cv. Shuguang) vegetative buds were evaluated in the research. We found that bud respiration was transiently inhibited by HT and the pentose phosphate pathway (PPP) and the cytochrome C pathway (CYT) were significantly affected. On the substrate level, PPP was activated in the HT-treated buds compared with the control group. However, the activation did mot occur until hours after HT treatment. The tricarboxylic acid cycle (TCA) in both the HT-treated buds and in the control group proceeded at a low level most of the time compared with total respiration. On the electron transfer level, CYT was transiently inhibited by HT but became significantly active in the later stage. CYT operation in the control group exhibited an attenuation process. The alternative pathway (ALT) fluctuated both in the HT-treated samples and in the control. The results suggest that the temporary CYT inhibition and the following PPP activation may be involved in HT-induced bud dormancy release and budburst mechanisms.

Key words: high temperature stress , dormancy release , respiration , nectarine , vegetative buds

TAN Yue, LI Ling, LENG Chuan-yuan, LI Dong-mei, CHEN Xiu-de, GAO Dong-sheng. Respiratory Response of Dormant Nectarine Vegetative Buds to High Temperature Stress[J]. Journal of Integrative Agriculture, 2013, 12(1): 80-86.

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Respiratory Response of Dormant Nectarine Vegetative Buds to High Temperature Stress

Respiratory Response of Dormant Nectarine Vegetative Buds to High Temperature Stress

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