保卫细胞

Result:The stomatic density and characteristic of leaf epidermis and stem epidermis in six Ephedra species was differenc,there were no ob...

结果：6种麻黄属植物之间气孔密度、茎、叶表面特征存在不同程度的差异；气孔表现出典型旱生植物的特征，略下陷，气孔保卫细胞被厚的角质层覆盖，并形成突起状角质唇状物；气孔大小、形状在种之间无明显区别；叶表面、茎表面气孔均属于无规则型，但形状明显不同，前者主要呈长方形或六边形，后者为窄条形或哑铃形。

Result:The stomatic density and characteristic of leaf epidermis and stem epidermis in six Ephedra species was differenc,there were no obvious morphological differences in stoma shape and size.

结果：6种麻黄属植物之间气孔密度、茎、叶表面特征存在不同程度的差异；气孔表现出典型旱生植物的特征，略下陷，气孔保卫细胞被厚的角质层覆盖，并形成突起状角质唇状物；气孔大小、形状在种之间无明显区别；叶表面、茎表面气孔均属于无规则型，但形状明显不同，前者主要呈长方形或六边形，后者为窄条形或哑铃形。

The characters in Impatiens, such as shape and lenghth of stomata, T-thickening at the polar region of guard cells and ornamemtation of leaf epidermis are more important between species and can be used one of the taxonomically important characters of Impatiens.

叶表面纹饰，气孔的形状、大小及气孔保卫细胞两极&T&型加厚等特征在种间具有一定的差异，可作为该属植物分类的重要特征之一文中还探讨了叶表皮微形态学特征在凤仙花属分类中的意义及有关紫花黄金凤的分类学地位间题。

In summary, we identified firstly that existence and distribution of JA and NOS in guard cell; presumed that the direct transport of JA from unwounded tissue to wounded site could account for the increase of JA after leaf wounding, and involved stomatal closure, and proposed a possible pathway of JA involved in regulating stomatal movemnts as follows: The production of NO stimulated by JA triggers the increases of cytosolic Ca〓 concentration, subsequently activate other downstream reactions and eventually induces stomatal closure.

本研究中我们首次确认了气孔保卫细胞中JA和NOS的存在和分布；伤引起的JA运输和分配的变化可能参与对气孔运动的调控，并提出JA调控气孔运动信号转导的一条可能途径：JA引起NO含量的增加，经第二信使Ca〓的作用及其下游事件，最终诱导气孔关闭。

The focus of this dissertation work is to investigate possible involvement and signal transduction mechanisms of cAMP in regulation of Vicia stomatal movements.

论文的第一部分，从蚕豆叶片表皮组织水平和气孔保卫细胞原生质体K〓通道水平确定cAMP参与了ABA或Ca〓对气孔运动的调节。

Comparing with diploid, the growing rate of tetraploid plants was slow and leaves became bigger, thicker, dark green and crimpled. The stomata density of tetraploid plants was reduced, but the guard cell of stomata became bigger and the chloroplast number in guard cells was increased.

与二倍体相比，四倍体表现为：生长变缓；叶片增大、皱缩和变厚、叶形指数减小；叶片保卫细胞增大，气孔密度降低，叶绿体数目增加，叶色加深。

The length changes of guard cells in flag leaves from 16 wheat genotypes with and without irrigation were observed.

观察来源于16个小麦基因型在有、无灌溉条件下，旗叶保卫细胞长度的变化。

The results indicated that genotype, irrigation and interaction of both the factors correlated tightly with the length and its distribution of guard cells in wheat flag leaves.

研究结果表明，基因型、灌溉及基因型和灌溉互作与旗叶保卫细胞的长度及其分布有密切关系。

The stomatal guard cells ofTI line are closure.

4T，代烟草叶下表皮保卫细胞气孔开度比对照的小。

It may be a modified stoma with the guard cells permanently open so that water is lost passively by hydrostatic pressure , as in sea lavenders, or a glandular hair from which water is actively secreted, as in runner bean.

这可能是由于气孔的保卫细胞永久张开而使水分在静水力的作用下被动排出，比如海薰衣草；也可能是由腺毛主动分泌水分到外部，比如红花菜豆。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。