Gene population encoding proteins that involve in plant defensive reactions and adversity resistance , such as p1a5 gene encoding a non - specific lipid - transfer protein , p1b4 gene encoding a raucaffricine - o - p - d - glucosidase and p2d4 , encoding a proline - rich protein ; ( 2 ) gene populations with antagonistic effects occurred simultaneously in sprouting bract , e . g . , 如pib4基因编码的葡萄糖昔酶、 pias基因编码的植物脂肪转移蛋白、 pzd4基因编码的一种富含脯氨酸的蛋白都有参与植物的抗逆、防御或应激反应的功能八2 ）幼嫩苞片中有互为桔抗作用的基因同期表达。
