The ascospores, on the other hand, are produced by following sexual reproduction . 另一方面,子囊孢子是在有性生殖之后產(chǎn)生的。
The clone locates daughter tillers by regulating the spacer at length , and the population of rhizome grass tre 31的生物量用于有性生殖生長,而所產(chǎn)生的籽實(shí)量僅占2
Under natural conditions , the clonal growing rhizomes of l . sagitta and l . virgaurea were suppressed due to interspecific competitions on the grassland , therefore the reproduction of the two plants mainly dependen on seeds 箭葉橐吾和黃帚橐吾,在自然條件下,其克隆生長的根狀莖,受到了草場其它生物的競爭而被抑制,主要進(jìn)行有性生殖。
In this paper , the whole process of it microsporogenesis and male gametophytes development was observed with microscope to sure weather stamen development is normal . at the same time , in order to provide techniques on biotechnology conservation and the foundation of its resources gene pool in cell engineering , its techniques on culture in vitro was studied 本論文通過對猬實(shí)小孢子發(fā)生和雄配子體發(fā)育全過程進(jìn)行細(xì)胞觀察,探尋猬實(shí)的雄性器官的發(fā)育是否是猬實(shí)有性生殖的薄弱環(huán)節(jié),并對猬實(shí)的離體培養(yǎng)進(jìn)行了初步的研究,為猬實(shí)生物技術(shù)保存、建立猬實(shí)種質(zhì)資源基因庫提供細(xì)胞工程方面的途徑和技術(shù)。