Laticifer differentiation in Hevea brasiliensis:: Induction by exogenous jasmonic acid and linolenic acid
Laticifer differentiation in Hevea brasiliensis:: Induction by exogenous jasmonic acid and linolenic acid
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DOI：
10.1006/anbo.1999.0995
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发表时间：
2000-01-01
期刊：
影响因子：
4.2
通讯作者：
Wu, JL
中科院分区：
文献类型：
--
作者：
Hao, BZ;Wu, JL
用含有茉莉酸（JA）的羊毛脂或其它化学物质涂抹橡胶树（Hevea brasiliensis）上胚轴的幼茎表面，研究了橡胶树茎尖的分化。幼茎有初生乳管，无次生乳管。当JA用于嫩茎伸长时，可显著增加初生乳管的数量，但不能诱导次生乳管的分化。次生乳管分化和初级乳管数量的增加不太显着的JA应用于延长的幼茎。次生乳管的诱导与JA浓度有关。形成层细胞分裂导致次生韧皮部的形成没有被JA处理加速。处理的树皮组织没有表现出明显的变化，除了额外的乳管，这是正常的超微结构。亚麻酸是茉莉酸生物合成的前体，也能诱导次生乳管的形成。脱落酸、乙烯利和水杨酸对乳管分化无明显影响。(C)2000年《植物学年鉴》（Annals of Botany Company）
Laticifer differentiation of Hevea brasiliensis was investigated by application of lanolin containing jasmonic acid (JA) or other chemicals to the surface of young stems in epicormic shoots. The young stems had primary laticifers and no secondary laticifers. When applied to extending young stems, JA led to a significant increase in primary laticifer number but did not induce secondary laticifer differentiation. Secondary laticifer differentiation and a less significant increase in primary laticifer number were caused by JA application to the extended young stems. The induction of the secondary laticifers was dependent on the concentration of JA applied. Cambium cell division leading to the formation of secondary phloem was not accelerated by JA treatment. Treated bark tissues showed no visible changes except for the additional laticifers, which were normal in ultrastructure. The secondary laticifers were also induced by the application of linolenic acid, a precursor of JA biosynthesis. Abscisic acid, ethephon and salicylic acid had no detectable effect on laticifer differentiation. (C) 2000 Annals of Botany Company.