Google
 

Back to Contents

 

Pak. J. Bot., 48(3): 899-905, 2016.

FREE FULL TEXT PDF

  Back to Contents
   

 

  Updated: 16-06-16

 

 

MORPHOLOGICAL, PHYSIOLOGICAL AND BIOCHEMICAL RESPONSES OF CAMELLIA OLEIFERA TO LOW-TEMPERATURE STRESS


JUANJUAN HU1
¬, WEI WU2¬, ZHIHUA CAO3, JIA WEN1, QINGLONG SHU1** AND SONGLING FU1**

 

Abstract: Camellia oleifera Abel originates from China and is high healthy effect food oil species. It is also a high additional plant in southern China and can help to keep some people of mountain area out of poverty. In recent years, climate change has been abnormal frequently. Abnormal low temperature in winter and late spring coldness may cause the hard hit to C. oleifera farmers. Freezing injury can be caused by sudden decreases in temperature in winter. However, C. oleifera varieties differ in their hardiness to low temperatures. The paper investigated cold-resistance mechanisms by determining and analyzing the morphological, physiological and biochemical characteristics of C. oleifera from eastern, western and southern Anhui, respectively. Sensitivity to low temperature was assessed via the number of leaves in spring shoots, leaf thickness, the activities of protective enzymes such as CAT, POD and SOD, and the inclusion contents of WSS, FPro, MDA, benzene-alcohol extracts and lignin. The results showed that C. oleifera varieties had different physiological and biochemical, and morphological responses to low winter temperatures. In different regions, the number of leaves, leaf thickness, WSS content, FPro content and MDA content varied from 5.2-7.8, 398.79µm-465.27µm, 23.41mg/g-24.74mg/g, 41.86µg/g-44.18µg/g and 10.08µmol/g-14.51µmol/g, respectively. The varieties from eastern Anhui, the leaf thickness were thicker. Meanwhile, the protective enzyme activities and inclusion contents were relatively higher. The protective enzyme activities and chemical components contents such as benzene-alcohol extract and lignin represented significantly difference (p<0.05) among three regions. In the future, for the abnormal low temperature in winter, a serious of cultivation measures such as improving the contents of WSS, FPro, benzene-alcohol extract and lignin, were taken to enhance the cold resistance of C. oleifera. The result broadens the understanding of cold-resistance mechanisms in C. oleifera.

 

Key words: Camellia oleifera, Temperature stress, CAT, POD and SOD.
 


1School of Forest and Landscape Architecture, Anhui Agricultural University, Hefei, Anhui 230036, China

2Agricultural Engineering Research Institute, Anhui Academy of Agricultural Science, Hefei 230036, China

3Institute of Commercial Forest, Anhui Academy of Forestry, Hefei, Anhui 230031, China

**Corresponding authors contribute equally. The first corresponding author’s email: juanzi5174@163.com;  Tel: 0086-551-65786561; Fax: 0086-551-65786512

¬Authors contribute equally


   
   

 

   
Back to Contents  

 

  Back to Contents