巴西橡胶树树皮单宁细胞结构和发育  

Structure and Development of Tannin Cells in Bark of Hevea brasiliensis

作　　者：史敏晶[1] 吴继林[1] 郝秉中[1] 谭海燕[1] 田维敏[1] 

机构地区：[1]中国热带农业科学院橡胶研究所农业部橡胶树生物学与遗传资源利用重点实验室省部共建国家重点实验室培育基地海南省热带作物栽培生理学重点实验室,儋州571737

出　　处：《林业科学》2014年第8期45-52,共8页Scientia Silvae Sinicae

基　　金：国家自然科学基金项目(31070535,31170642);现代农业产业技术体系建设专项(CARS-34-GW1)

摘　　要：利用光学和电子显微镜技术,对巴西橡胶树树皮中单宁细胞的形态结构和发育过程进行研究。结果表明:除伴胞外,次生韧皮部中几乎所有的薄壁细胞都含有单宁类物质,乳管周围的薄壁细胞中尤其易积累单宁,石细胞和周皮中的木栓层以及栓内层细胞中也有大量单宁积累。电镜下,单宁细胞中央大液泡中积累的单宁可分为絮状、不规则状、颗粒状和板块状4种类型。在单宁细胞发育过程中,单宁首先在细胞质中产生,中央大液泡形成后则成为积累单宁的主要场所并最终被单宁类物质充满。机械伤害、强割、外施乙烯利以及茉莉酸(JA)都能大幅提升单宁类物质的积累,可见橡胶树对这些因子都能做出防御性应答。The morphological structure and development of tannin cells in bark of Hevea brasiliensis were studied by using transmission electron microscopy and light microscopy. The results showed that tannin-like materials distributed in all kinds of parenchyma cells in secondary phloem except for companion cells. The tannin-like materials were present in large amounts in the parenchyma cells around the laticifers,the stone cells,cork layer cells and phelloderm cells. Under the electron microscope,four forms of tannin-like materials,i. e. ,flocculent,irregular,granular and plate-like,could be distinguished in the large central vacuoles of tannin cells. During the course of development of tannin cell,tannin-like materials firstly deposited into small vesicles in cytoplasm,then stored mainly in the large central vacuole along with the synthesis of tannins. As a result,the tannin-like materials filled the large central vacuole of the mature tannin cells. The accumulation of tannin-like materials was largely enhanced by mechanic wounding,over-exploitation,and application of either Ethrel or Jasmonate （ JA） ,reflecting the response of rubber tree to various stress factors.

关 键 词：S759 3 巴西橡胶树 单宁细胞 形态结构 发育 

分 类 号：S759.3[农业科学—森林经理学]