本文通过病毒防御作用、作用模式、沉默信号的传递特点和植物病毒对转录后基因沉默的抑制作用四方面对植物中转录后基因沉默现象进行综述。
In this paper, the affection of PTGS in virus resistance, PTGS mechanism model, transmission of silence message and suppression of virus protein to PTGS are reviewed.
然后，从物种选择、植物助长方面对植被建植技术进行了研究，提出了简易可行的五步选种方法；
Secondly, it investigates that technology of vegetation construction from the selecting seed and the helping grow, put forwards a method that selecting the seed.
然后，从物种选择、植物助长方面对植被建植技术进行了研究，提出了简易可行的五步选种方法；
Secondly, it investigates that technology of vegetation construction from the selecting seed and the helping grow, put forwards a method that selecting the seed.
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