000			01563nam a2200193Ia 4500
008			220216s9999 xx 000 0 und d
100			_aShoucai Chen
245		0	_aRelationship between rubber transferase activity and yielding ability of Hevea trees
260			_bChinese Journal of Tropical Crops _c1994
300			_a6
520			_aRubber transferase (RT) from Hevea brasiliensis was found to be a membrane protein located on rubber particles and not a hydrophilic protein existing in latex serum. The activities of RTs in rubber trees from cultivars SCATC4, PR107 and SCATC35 which have been tapped for several years were determined under different temperatures ranging from 4 C to 50 C. The results show the highest activity of RT at 25 C and a positive correlation at any temperature between the RT activities and the yields of various cultivars. Detection o RT activities of one year old trees from SCATC7-33-97, RRIM600, Haikenl, PB86 and Tianren 3145 demonstrates a significant positive correlation between their RT activities and rubber yields. These facts suggest that RT should be key enzyme in rubber biosynthesis and hence the possibility of creating high yielding and resistant rubber trees by RT cloning and transfering. RT is likely to become a reliable index for yield prediction of rubber trees at the nurserny stage in breeding programme.
650			_aHevea brasiliensis
650			_aRubber transferase
650			_aYielding ability
700			_aDongqiong Fu
700			_aHanshuang Shao
700			_aXueqin Zheng
942			_cJS
999			_c66687 _d66687