النتائج (
العربية) 1:
[نسخ]نسخ!
central vacuole is formed. As the microspore nears the first pollen mitosis, the nucleus is pressedup near the periphery of the microspore (Figure 17.1A). Staining will still be fairly light. Pollenmitosis is of short duration, but it may sometimes be observed; it is recognized by the presence ofcondensed chromosomes (Figure 17.1B). The product of the first pollen mitosis is a binucleatemicrospore containing a large vegetative and a small generative nucleus. The vegetative nucleus isoften difficult to recognize because it is so diffuse and lightly staining. However, this stage maybe definitively identified by the presence of the small densely staining generative nucleus (Figure17.1C). As the binucleate microspore ages, the intensity of the staining increases and starch granulesbegin to accumulate (Figure 17.1D). Eventually, both nuclei may be hidden by the dark stainingstarch granules.
يجري ترجمتها، يرجى الانتظار ..
