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以“珍玉8号”和“珍玉10号”2个西葫芦品种为试材,采用4种不同的温光组合进行低温弱光和恢复处理,研究低温弱光和恢复过程中西葫芦生理指标的变化。结果表明:低温弱光条件下,随着光照和温度的降低,西葫芦株高、茎粗、叶面积的增长量及西葫芦叶片中可溶性蛋白质含量和超氧化物歧化酶(SOD)活性均有不同程度的降低;而可溶性糖含量和过氧化物酶(POD)活性整体升高;恢复后发现,适当的低温(15℃/8℃)和弱光(30μmol·m~(-2)·s~(-1))对植株的生长影响不大,低温(15℃/8℃)强光(60μmol·m~(-2)·s~(-1))和过高的胁迫强度(10℃/5℃、30μmol·m~(-2)·s~(-1))会显著抑制西葫芦的生理生化变化。其中“珍玉10号”对低温弱光的适应性和恢复力均强于“珍玉8号”;综上所述,过低的温度和弱光严重影响西葫芦的生长发育,该试验中低温(15℃/8℃)和弱光(30μmol·m~(-2)·s~(-1))是最佳处理。
Two varieties of zucchini, “Zhenyu 8” and “Zhenyu 10”, were used as experimental materials, and 4 different combinations of light and temperature were used to study the low temperature and low light and restore treatment. Changes of Physiological Index in Zucchini The results showed that the growth of plant height, stem diameter, leaf area and the contents of soluble protein and superoxide dismutase (SOD) in leaves of Zucchini were different under low temperature and low light conditions with the decrease of light and temperature (POD) and soluble sugar content (POD) were all increased. After recovery, it was found that proper low temperature (15 ℃ / 8 ℃) and low light (30μmol · m -2 · s ~ -1) had little effect on the growth of the plants, the light intensity (60μmol · m -2 · s -1) at low temperature (15 ℃ / 8 ℃) and the stress intensity (10 ℃ / 5 ℃, 30μmol · m -2 · s -1 could significantly inhibit the physiological and biochemical changes of zucchini. Among them, “Zhenyu 10 ” low temperature and low light adaptability and resilience are stronger than “Zhenyu 8 ”; In summary, the low temperature and weak light seriously affect the growth and development of zucchini, In this experiment, low temperature (15 ℃ / 8 ℃) and low light (30μmol · m -2 · s -1) were the best treatments.