干旱胁迫对榛子果实的影响

Effects of Drought Stress on the Fruit of Corylus heterophylla

以种仁发育期遭受自然干旱胁迫的6年生杂种榛达维为试材,定期测定果实各部分的干重和含水量,研究干旱胁迫对榛子果实的影响。结果表明:遭受干旱胁迫的榛树,整个过程中果仁干重连续而平缓增加,没有出现停止增长的现象,但干旱对种仁干重增长的抑制作用明显,同期与浇水处理的干重比,最低值为0.59,果实成熟时为0.79。干旱胁迫降低了果实各部分绝对含水量,增加了相对含水量的波动幅度,但不改变各部分含水量的变化规律,果实按照其自身的规律进行各部分的水分调节和分配。

6-year-old hybrid hazel Davi in kernel development stage under natural drought stress was used as test materials to determine the dry weight and water content of different parts of Corylus heterophylla fruit regularly,and the effects of drought stress on the fruit of C.heterophylla were studied.The results showed that the dry weight of C.heterophylla kernel increased continuously and slowly during the whole process under drought stress,there was no growth-stopping phenomenon.The drought had an obvious inhibition on the growth of kernel dry weight.The lowest dry weight ratio of irrigation treatment was 0.59,that of the ripe fruit was 0.79.Drought stress reduced the absolute water content in each part of the fruit and increased the fluctuation range of relative water content,but it did not change the change rules of water content in each part.The water regulation and distribution in various parts of fruit were in accordance with its own laws.