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在温室试验条件下,以盆栽3年生扁桃主要砧木毛桃和石头扁桃为试材,设置4个水平土壤含水量处理,分别为100%,80%,60%和40%,水分胁迫处理7,14,21 d后取叶样,并测定脯氨酸、可溶性蛋白质、质膜透性、相对含水量的变化。研究结果表明:随着水分胁迫的加剧,两种砧木叶片的脯氨酸含量迅速增加,随着胁迫时间的延长,脯氨酸积累幅度降低。石头扁桃和毛桃叶片的可溶性蛋白质的含量随水分胁迫的加剧而增多,随着胁迫时间的延长,可溶性蛋白质含量有所下降,在第21天时,石头扁桃叶片中的可溶性蛋白的含量趋于一致。两种砧木叶片的质膜透性随着水分胁迫的加剧而增加,随着水分胁迫时间的延长,增加更为迅速。随水分胁迫程度的加强,两种砧木叶片的相对含水量降低,但随胁迫时间的延长,相对含水量变化不明显。过量水分供应对扁桃的生理作用产生不良影响,3年生扁桃砧木对土壤水分的要求是田间持水量的60%~80%;石头扁桃的抗旱性比毛桃强。
Under the greenhouse test conditions, the main rootstock peaches and almonds in pots of three-year-old almond were used as test materials, and four soil moisture levels were set as 100%, 80%, 60% and 40%, respectively. After 21 days, leaf samples were taken and the changes of proline, soluble protein, plasma membrane permeability and relative water content were measured. The results showed that with the increase of water stress, the contents of proline in leaves of two rootstocks increased rapidly, and the proline accumulation decreased with the prolongation of stress time. The content of soluble protein in almond and peach leaves increased with the increase of water stress, and the content of soluble protein decreased with the prolongation of stress time. The contents of soluble protein in almond and stone leaf tended to be the same on the 21st day. The plasma membrane permeability of the two rootstocks increased with the increase of water stress, and increased more rapidly with the increase of water stress time. With the enhancement of the degree of water stress, the relative water content of the leaves of the two rootstocks decreased, but the change of the relative water content was not obvious with the extension of the stress time. Excessive water supply has a negative impact on the physiological effects of almond. The soil water requirement of 3-year almond rootstock is 60% ~ 80% of the field capacity. The drought resistance of Almond is higher than that of peach.