气孔

Compared with diploidy seedlings of P.elongate,leaf length and stomata size of tetraploid becomes bigger,the leaf length/width ratio and stomata density becomes smaller.

变异植株叶片比二倍体大，叶片长宽比变小，叶片单个气孔变大，气孔密度变小。

In this way, it is easy to distinguish the upper from the lower side of plant epidermis and pike a proper point precisely.

通过对传统的植物叶片气孔观察方法的改良，建立了一种观察单子叶植物气孔的有效方法。

The results showed that the linear expansivity and apparent porosity of the samples increased with increasing the percentage of matrix materials and aggregate size.

结果表明，随着基质料含量的增加和骨料粒度的增大，试样的线变化率和显气孔率逐渐增大；随着成型压力的增加，试样的显气孔率明显减小，线变化率增加。

It was observed that the NPT lines had lower stomatal frequency and higher stomatal resistance than the indica varieties.

在盆栽条件下比较了 4种国际水稻研究所水稻新株型和 4种籼稻的气孔频率、气孔阻力和光合速率。

The simulated results with this model match well with the results obtained by weighing lysimeter. Because there are not good stomatal models to predict the stomatal conductance, it was inputted from measured results, then the evapotranspiration rate is simulated separately for different times in a day.

模拟的结果与lysimeter的测量结果符合得比较好，但由于没有合适的气孔模型，所以模型中的气孔导度是用测定值代入的，因而模拟的蒸散量不是连续的。

The palisade is from one to two layers thick, the spongy mesophyll usually cosists of four layers of cell.

在下表面气孔完全暴露，多数是开放的，而上表面的气孔多数是关闭的。

Results showed that the diurnal changes in Pn of the species in different periods were similar and could be expressed as two-hump curves, reflecting a significant middy depression. The decrease in Pn during midday was mainly resulted from non-stomatal limitation in July, but stomatal limitation occurred in August and September. High temperature and low relative humidity were critical factors constraining Pn in July.

结果表明，不同时期防风净光合速率日变化均呈双峰型曲线，具有明显的光合"午休"现象。7月份防风光合速率中午降低主要由非气孔限制引起，8月份、9月份防风光合速率中午降低则主要由气孔限制引起，7月份高温低湿是限制防风Pn的主要环境因子。

Our results suggest that the oxhide pastern is the best way to observe stomatal movement of A.corniculatum compared with the puddle method and the nail poish pastern.

结果表明：搅碎法、指甲油印迹法、牛皮胶印迹法三种观察气孔方法中，牛皮胶印迹法是观察气孔开度变化的最佳方法。

The results suggested that the oxhide pastern print was the best way to observe stomatal movement of A. comiculatum compared with the blender method and the nail enamel print method.

结果表明：在搅碎法、指甲油印迹法、牛皮胶印迹法三种观察气孔方法中，牛皮胶印迹法是观察气孔开度变化的最佳方法。

No penetrable hole of 3mm or large pore over 6mm diameter, less than 3 pores in 5mm diameter within 1m2 is acceptable.

不允许直径为3MM的对穿孔和直径为6MM的大气孔，允许1M2 范围内有3个以下直径为5MM的大气孔。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。