Nutritional components in leaves of Premna microphylla Turcz. were analyzed. Compared with the major crops and forages in China, its nutritional value was evaluated. The contents of crude protein and total amino acid in leaves of P. microphylla were 134.8 and 108.1 mg/g respectively. It was rich in contents of Vc (3.6 mg/g), βcarotene (0.2 mg/g) and mineral elements. So this species is a wild plant resources which can be utilized widely.
砀山酥梨脱病毒苗培养基中添加外源激素能通过调节内源激素的含量,从而控制脱病毒苗的增殖和生长。苄基腺嘌呤(benzyladen ine,BA)处理可提高脱病毒苗内源玉米素核苷(zeatin riboside,ZR)含量,而脱病毒苗的有效增殖芽数与IAA/ZR比值呈显著负相关;1萘-乙酸(1-naphthalene acetic ac id,NAA)处理可显著提高内源吲哚乙酸(indole acetic ac id,IAA)含量,较高的内源IAA含量有利于芽梢的生长;继代组培苗体内含有一定量的内源赤霉素(G iberllic Ac id,GA1+3),适量的外源GA3处理,可提高内源GA1+3含量而显著降低脱落酸(absc isic ac id,ABA)含量,促进芽梢的伸长和叶面积的扩大。
