Journal of Integrative Agriculture ›› 2013, Vol. 12 ›› Issue (6): 979-988.DOI: 10.1016/S2095-3119(13)60318-4

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Effects of Increased Night Temperature on Cellulose Synthesis and the Activity of Sucrose Metabolism Enzymes in Cotton Fiber

 TIAN Jing-shan, HU Yuan-yuan, GAN Xiu-xia, ZHANG Ya-li, HU Xiao-bing, GOU Ling, LUO Hong-hai   

  1. Key Laboratory of Oasis Eco-Agriculture, Xinjiang Production and Construction Group/College of Agronomy, Shihezi University, Shihezi 832003, P.R.China
  • 收稿日期:2012-07-01 出版日期:2013-06-01 发布日期:2013-06-09
  • 通讯作者: Correspondence ZHANG Wang-feng, Tel: +86-993-2057326, E-mail: zhwf_agr@shzu.edu.cn
  • 基金资助:

    This study was financially supported by the Specialized Research Fund for the Doctoral Program of Higher Education, China (20070759002) and the Key Technologies R&D Program of China during the 11th Five-Year Plan period (2006BAD21B02).

Effects of Increased Night Temperature on Cellulose Synthesis and the Activity of Sucrose Metabolism Enzymes in Cotton Fiber

 TIAN Jing-shan, HU Yuan-yuan, GAN Xiu-xia, ZHANG Ya-li, HU Xiao-bing, GOU Ling, LUO Hong-hai   

  1. Key Laboratory of Oasis Eco-Agriculture, Xinjiang Production and Construction Group/College of Agronomy, Shihezi University, Shihezi 832003, P.R.China
  • Received:2012-07-01 Online:2013-06-01 Published:2013-06-09
  • Contact: Correspondence ZHANG Wang-feng, Tel: +86-993-2057326, E-mail: zhwf_agr@shzu.edu.cn
  • Supported by:

    This study was financially supported by the Specialized Research Fund for the Doctoral Program of Higher Education, China (20070759002) and the Key Technologies R&D Program of China during the 11th Five-Year Plan period (2006BAD21B02).

摘要: Temperature is one of the key factors that influence cotton fiber synthesis at the late growth stage of cotton. In this paper, using two early-maturing cotton varieties as experimental materials, night temperature increase was stimulated in the field using far-infrared quartz tubes set in semi-mobile incubators and compared with the normal night temperatures (control) in order to investigate the effects of night temperature on the cotton fiber cellulose synthesis during secondary wall thickening. The results showed that the activity of sucrose synthase (SuSy) and sucrose phosphate synthase (SPS) quickly increased and remained constant during the development of cotton fiber, while the activity of acid invertase (AI) and alkaline invertase (NI) decreased, increased night temperatures prompted the rapid transformation of sugar, and all the available sucrose fully converted into cellulose. With night temperature increasing treatment, an increase in SuSy activity and concentration of sucrose indicate more sucrose converted into UDPG (uridin diphosphate-glucose) during the early and late stages of cotton fiber development. Furthermore, SPS activity and the increased concentration of fructose accelerated fructose degradation and reduced the inhibition of fructose to SuSy; maintaining higher value of allocation proportion of invertase and sucrose during the early development stages of cotton fiber, which was propitious to supply a greater carbon source and energy for cellulose synthesis. Therefore, the minimum temperature in the nightime was a major factor correlated with the activity of sucrose metabolism enzymes in cotton fiber. Consequently, soluble sugar transformation and cellulose accumulation were closely associated with the minimum night temperature.

关键词: cotton fiber , night temperature , sucrose metabolism , enzyme activity

Abstract: Temperature is one of the key factors that influence cotton fiber synthesis at the late growth stage of cotton. In this paper, using two early-maturing cotton varieties as experimental materials, night temperature increase was stimulated in the field using far-infrared quartz tubes set in semi-mobile incubators and compared with the normal night temperatures (control) in order to investigate the effects of night temperature on the cotton fiber cellulose synthesis during secondary wall thickening. The results showed that the activity of sucrose synthase (SuSy) and sucrose phosphate synthase (SPS) quickly increased and remained constant during the development of cotton fiber, while the activity of acid invertase (AI) and alkaline invertase (NI) decreased, increased night temperatures prompted the rapid transformation of sugar, and all the available sucrose fully converted into cellulose. With night temperature increasing treatment, an increase in SuSy activity and concentration of sucrose indicate more sucrose converted into UDPG (uridin diphosphate-glucose) during the early and late stages of cotton fiber development. Furthermore, SPS activity and the increased concentration of fructose accelerated fructose degradation and reduced the inhibition of fructose to SuSy; maintaining higher value of allocation proportion of invertase and sucrose during the early development stages of cotton fiber, which was propitious to supply a greater carbon source and energy for cellulose synthesis. Therefore, the minimum temperature in the nightime was a major factor correlated with the activity of sucrose metabolism enzymes in cotton fiber. Consequently, soluble sugar transformation and cellulose accumulation were closely associated with the minimum night temperature.

Key words: cotton fiber , night temperature , sucrose metabolism , enzyme activity