造价通
更新时间:2024.04.27
二球悬铃木展叶期叶片生长及3个生理指标的动态变化

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Dynamic changes of leaf growth and three physiological indexes of Platanus×acerifolia(Ait.) Willd.were studied in leaf expansion stage.The results show that in leaf expansion stage(April 4 to April 26),the weight and area of individual leaf increase gradually,and reach their peaks on April 26 and rise to 9.8 and 39.2 times of that in the initial stage,respectively.With the growth of P.×acerifolia leaf,the chlorophyll content has an increasing trend,and the increasing range is great.Protein content and POD activity appear a declining trend,and the declining range is great.All the three physiological indexes have some minor fluctuations.Contents of Chla,Chlb and Chl(a+b) are the highest on April 26 and rise to 3.41,5.91 and 4.00 times of that in the initial stage.Protein content and POD activity reach the lowest points on April 26 and April 16,respectively and decline by 73.42% and 94.41% of the initial stage of leaf expansion.

二球悬铃木花粉萌发及花粉保存研究

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以新鲜采集的二球悬铃木花粉为试材,研究了不同浓度的蔗糖及硼酸对花粉萌发的影响,并在此基础上研究了不同贮藏温度对干燥与未干燥的二球悬铃木花粉生活力的影响。结果表明:在15%蔗糖+0.10%硼酸的液体培养基上花粉萌发最好;不同贮藏温度对花粉的生活力影响显著,随着贮藏温度的降低,花粉生活力上升,且贮藏时间延长,常温条件下贮藏10d后花粉生活力为0%,而在-72℃条件下贮藏38d,干燥花粉仍有24.65%生活力;花粉经硅胶干燥4h后耐贮性明显高于新鲜花粉。综合分析,经硅胶干燥后于-72℃条件下贮藏利于二球悬铃木花粉的保存。

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