蒙农4号新麦草幼穗穗长与花药发育的阶段性特征分析

Chinese Journal of Grassland(2015)

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Abstract
取不同长度蒙农4号新麦草幼穗,以石蜡切片及显微照相方法分析花药发育各阶段,结果显示,蒙农4号新麦草幼穗0~3cm长度为幼穗花药发育早期,4cm~13cm为花药发育的中期.花粉囊具初生造孢细胞主要在穗长度为0~4cm时期,大量造孢细胞充满花粉囊腔在幼穗长度为4~7cm时期,产生细胞间隙为7cm以上时期,小孢子母细胞出现在幼穗长大于5cm时期,10~13cm为减数分裂阶段,13cm以上预测为单核花粉粒形成阶段.幼穗长度为12~13cm时花药未完全成熟.
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Key words
Psathrostachys juncea cv.Mengnong No.4,Anatomical structure,Young spike
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