颖片

接种后36h，寄主体表菌丝产生入侵菌丝，以直接入侵方式由颖片、外稃、内稃的内侧及子房的顶部侵入寄主组织体内，随后，菌丝以胞间和胞内生长的方式向下扩展；

Penetration of host tissues occurred on inner surfaces of glume , lemma , palea and on the upper part of ovary by infection hyphae 36 h after inoculation . The hyphae in these infected tissues then spread downward to rachis by inter - and intracellular growth .

膨胀的最低的小穗轴节间和贴生的更低的颖片形成这。

This is formed by the swollen lowest rachilla internode and adnate lower glume .

秆可达1。5米；稀疏的无梗小穗的上面颖片具柔毛。

Culms up to1.5 m ; upper glume of sessile spikelet thinly pilose .

两种植物的子实及其颖片在大小和形态上极其相似。

The size and morphological characterization of the glume of the fruit of the two plants are very similar .

这一小相异，地区分布的表面上，按无梗小穗的有毛的上面颖片主要区分。

This is a small variant , apparently of local distribution , distinguished mainly by the hairy upper glume of the sessile spikelet .

分布在颖片表面中部的这种特殊结构物与颖片表面其它部位的相比较，体积大、数量少、密度小。不同植株，结构物的形状略有变化。

The structures distributed on the middle part of glume surface are of bigger size and lower density compared to those on the other parts .

颖片对假高粱种子的萌发具有物理阻碍和化学抑制作用，是导致其种子休眠的主要原因。

Result The results showed that the glume of Johnsongrass had physical obstructing and chemical inhibiting effects on seed germination , and it was the major cause of seed dormancy .