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Journal Article 2

Year

2016 2

Keywords

Hevea brasiliensis 2

early evaluation 1

histone acetylation 1

laticifer differentiation 1

rubber yield breeding 1

secondary laticifer differentiation 1

tapping 1

trichostatin 1

vascular cambia 1

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The secondary laticifer differentiation in rubber tree is induced by trichostatin A, an inhibitor of histone acetylation

Shixin ZHANG,Shaohua WU,Weimin TIAN

Frontiers of Agricultural Science and Engineering 2016, Volume 3, Issue 4, Pages 357-362 doi: 10.15302/J-FASE-2016125

Abstract: The secondary laticifer, a specific tissue in the secondary phloem of rubber tree, is differentiated from the vascular cambia. The number of the secondary laticifer in the trunk bark of rubber tree is positively correlated with rubber yield. Although jasmonates have been demonstrated to be crucial in the regulation of secondary laticifer differentiation, the mechanism for the jasmonate-induced secondary laticifer differentiation remains to be elucidated. By using an experimental morphological technique, the present study revealed that trichostatin A (TSA), an inhibitor of histone deacetylation, could induce the secondary laticifer differentiation in a concentration-dependent manner. The results suggest that histone acetylation is essential for the secondary laticifer differentiation in rubber tree.

Keywords： Hevea brasiliensis histone acetylation laticifer differentiation trichostatin vascular cambia

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Relationship between the number of tapping-induced secondary laticifer lines and rubber yield among

Yueyi CHEN,Xinsheng GAO,Xiaofei ZHANG,Weimin TIAN

Frontiers of Agricultural Science and Engineering 2016, Volume 3, Issue 4, Pages 363-367 doi: 10.15302/J-FASE-2016122

Abstract: The lack of suitable early selection parameters means that traditional rubber breeding for yield is time-consuming and inefficient. Laticifer is a tissue specific for natural rubber biosynthesis and storage in rubber tree. The number of the secondary laticifers in the trunk bark tissues is positively correlated with rubber yield in the matured rubber trees that are regularly tapped. In the present study, the rubber yield from 280 of 4–5 year-old virgin trees from 7 cross combinations was compared with the number of newly differentiated secondary laticifers caused by tapping. Results showed that the number of tapping-induced lines of secondary laticifers varied in different germplasm and was positively related to the rubber yield, indicating this could be used as a suitable parameter for early evaluation of yield potential of rubber trees.

Keywords： Hevea brasiliensis rubber yield breeding early evaluation tapping secondary laticifer differentiation