Abstract：
Over the past decade, the extent and magnitude of acid rain in Vietnam and other Asian countries have become more apparent. In this study, the effect of simulated acid rain (pH 5.0, 4.0, and 3.0) and control treatment (pH 6.0) are observed for three species Brassica integrifolia, Brassica rapa, and Brassica juncea in Hanoi. The pot experiment was conducted for 42 days and arranged according to a randomized complete block design (RCBD), replicated 3 times with acid rain exposure being supplied every 4 days. The results show that acid rain causes direct damage to leaves. Observations reveal white spots on leaves; leaves getting discolored and gradually turning yellow, curling leaf marginals, and turning dark blue, with the most severe symptoms being necrotic leaves. Parameters of the shoot and root length, leaf area, biomass, and chlorophyll content all decrease as pH drops. However, the accumulation of proline content in leaves tends to increase with greater acidity. In conclusion, Brassica rara has the highest resistance capability to acid rain compared with Brassica integrifolia and Brassica juncea, especially its proline content is the highest at pH 3.0 in three Brassicaceae species.
摘要：
在过去的十年里，越南和其他亚洲国家酸雨的程度和幅度已经变得更加明显。在这项研究中,观察到模拟酸雨（pH5.0、4.0和3.0）和对照处理（pH6.0）对三种芸苔的影响，芸苔属油菜,和在河内的芥菜。盆栽实验进行了42天，并根据随机完整区组设计（RCBD）进行安排，每4天提供一次酸雨暴露，重复3次。结果表明，酸雨对叶片造成直接损害。观察发现叶子上有白点；叶子变色并逐渐变黄，卷边叶,变成深蓝色，最严重的症状是坏死的叶子。枝条和根长度的参数，叶面积,生物量，和叶绿素含量都随着pH的下降而下降。然而,随着酸度的增加，叶片中脯氨酸含量的积累趋于增加。总之,与甘蓝型油菜和甘蓝型油菜相比，甘蓝型油菜对酸雨的抗性最高，尤其是在三种十字花科植物中，其脯氨酸含量在pH3.0时最高。
