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本文研究了板栗贮藏过程中呼吸作用变化和内源激素含量与贮藏温度的关系,确定了板栗的休眠时期,并探讨了通过贮藏温度调控板栗休眠和萌芽的措施。研究结果表明,板栗休眠期长短与贮藏温度有密切关系,在室温(20℃~22℃)贮藏条件下板栗的休眠期为2个月左右,在冷藏(0℃~2℃)条件下的休眠期为3个月左右。说明虽然冷藏较室温贮藏能延长板栗的休眠期,但不能完全控制休眠。板栗休眠解除后,在生理上表现为呼吸作用上升和内源激素(IAA、GA3、ZR)含量增加,外观上表现为胚芽萌动生根。冷藏板栗在休眠解除前将贮藏温度降至临界低温(-2℃~-4℃),可有效地抑制呼吸回升和内源激素的合成,使休眠不被解除,从而在整个贮藏过程中不萌芽。经临界低温贮藏的板栗,仍较好地保持种子活力,出库后品质和萌芽正常,未造成低温伤害。
In this paper, we studied the relationship between the changes of respiration and the contents of endogenous hormones and the storage temperature during chestnut storage, determined the dormancy period of chestnut, and discussed the measures to control dormancy and germination of chestnut through storage temperature. The results showed that the dormancy duration of chestnut was closely related to the storage temperature. The dormant period of chestnut stored at room temperature (20 ℃ ~ 22 ℃) was about 2 months, and the dormancy of chestnut stored at 0 ℃ ~ 2 ℃ The period is about 3 months. Although cold storage at room temperature can prolong chestnut dormancy, but can not completely control dormancy. Chestnut dormancy release, the physiological manifestations of respiration and endogenous hormones (IAA, GA3, ZR) content increased, the appearance of the germination of germination rooting. Cold chestnuts reduce the storage temperature to a critical low temperature (-2 ° C to -4 ° C) before dormancy release, which effectively restores respiratory rebound and endogenous hormones, so that dormancy will not be relieved and thus will not germinate throughout the storage . The chestnut stored at the critical low temperature maintained the vigor of the seed well, and the quality and germination of the chestnut were normal after leaving the warehouse without any damage caused by low temperature.