Essential oil gland number and ultrastructure during Mentha arvensis leaf ontogeny
Essential oil gland number and ultrastructure during Mentha arvensis leaf ontogeny
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DOI：
10.1023/a:1002461101852
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发表时间：
1999-01-01
影响因子：
1.5
通讯作者：
Sangwan, RS
中科院分区：
文献类型：
--
作者：
Shanker, S;Ajayakumar, PV;Sangwan, RS
薄荷叶精油腺体的数量、分布、精细结构和含油量的变化。在其生长和衰老过程中进行了检测。精油的积累主要发生在快速叶片扩展阶段，随后出现类似的下降。油腺（毛状体）数量增加叶片成熟后下降。最初，角质层仍然紧密贴靠在油腺的分泌头上，但逐渐地，似乎为油创造了一个角质层下的空间。随着年龄的增长，液泡明显增大，而细胞质逐渐减少，形成一层薄薄的外围层。衰老叶片的分泌细胞几乎空无一物，只有少量油滴残留。
Alterations in essential oil gland number, distribution and fine structure, and the oil content in the leaf of Mentha arvensis L. were examined during its growth and senescence. Accumulation of essential oil occurred predominantly during the rapid leaf expansion phase followed by a similar decline. The oil gland (trichome) number increased upto leaf maturation and declined thereafter. Initially, cuticle remains tightly apposed to the secretory head of oil glands but progressively a sub-cuticular space appears to be created for the oil. Considerable enlargement of vacuole with ageing is witnessed, whereas cytoplasm gradually decreases to a thin peripheral layer. Some secretory cells from senescing leaf were found almost empty, having only a few remnant oil droplets.