Leaf Cuticular Transpiration Barrier Organization in Tea Tree Under Normal Growth Conditions.
Leaf Cuticular Transpiration Barrier Organization in Tea Tree Under Normal Growth Conditions.
复制标题
正常生长条件下茶树叶片角质层蒸腾屏障组织
DOI：
10.3389/fpls.2021.655799
复制
发表时间：
2021
影响因子：
5.6
通讯作者：
Chen C
中科院分区：
文献类型：
--
作者：
Chen M;Zhang Y;Kong X;Du Z;Zhou H;Yu Z;Qin J;Chen C
角质层在限制植物非气孔水分蒸腾中起主要作用。因此，了解植物角质层的结构和功能一直是人们感兴趣的问题。尽管已经投入了许多努力，但各种角质层参数对水分蒸腾屏障的贡献程度仍然存在争议。本研究在常规条件下培育了8份茶树种质资源，分析了叶表面和叶表面的角质层厚度、蜡质覆盖率和化学成分。从单叶表面和角质层内蜡层测量了角质层蒸腾速率。还计算了两个叶表面的表皮层蜡阻。对角质层蒸腾速率(或阻力)与角质层各参数的相关性进行了分析。我们发现，远轴角质层蒸腾速率占总角质层蒸腾量的78%，是影响角质层总蒸腾量变化的主要因素。在近轴面，主要的角质层蒸腾屏障位于皮质内蜡层，而在背面，主要的角质层蒸腾屏障位于表层蜡层。角质层厚度不是影响角质层蒸腾作用的因素。然而，远轴上皮层蜡包被发现与远轴上皮层阻力显著正相关。相关分析表明，超长链脂肪族化合物和乙二醇酯在正常条件下生长的茶树的角质层蒸腾屏障中起主要作用。我们的结果为茶叶角质层中复杂的结构-功能关系提供了新的见解。
The cuticle plays a major role in restricting nonstomatal water transpiration in plants. There is therefore a long-standing interest to understand the structure and function of the plant cuticle. Although many efforts have been devoted, it remains controversial to what degree the various cuticular parameters contribute to the water transpiration barrier. In this study, eight tea germplasms were grown under normal conditions; cuticle thickness, wax coverage, and compositions were analyzed from the epicuticular waxes and the intracuticular waxes of both leaf surfaces. The cuticular transpiration rates were measured from the individual leaf surface as well as the intracuticular wax layer. Epicuticular wax resistances were also calculated from both leaf surfaces. The correlation analysis between the cuticular transpiration rates (or resistances) and various cuticle parameters was conducted. We found that the abaxial cuticular transpiration rates accounted for 64–78% of total cuticular transpiration and were the dominant factor in the variations for the total cuticular transpiration. On the adaxial surface, the major cuticular transpiration barrier was located on the intracuticular waxes; however, on the abaxial surface, the major cuticular transpiration barrier was located on the epicuticular waxes. Cuticle thickness was not a factor affecting cuticular transpiration. However, the abaxial epicuticular wax coverage was found to be significantly and positively correlated with the abaxial epicuticular resistance. Correlation analysis suggested that the very-long-chain aliphatic compounds and glycol esters play major roles in the cuticular transpiration barrier in tea trees grown under normal conditions. Our results provided novel insights about the complex structure–functional relationships in the tea cuticle.
登录
查看更多内容
影响因子：
5.3
作者：
Hasanuzzaman M;Davies NW;Shabala L;Zhou M;Brodribb TJ;Shabala S
通讯作者：
Shabala S
影响因子：
2.8
作者：
Fukuda, Satoshi;Satoh, Atsushi;Takeuchi, Yuichi
通讯作者：
Takeuchi, Yuichi
影响因子：
4.3
作者：
RIEDERER, M;SCHNEIDER, G
通讯作者：
SCHNEIDER, G
影响因子：
7.3
作者：
Jetter, R;Schäffer, S;Riederer, M
通讯作者：
Riederer, M
影响因子：
8.8
作者：
Romero, Paco;Rose, Jocelyn K. C.
通讯作者：
Rose, Jocelyn K. C.