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以枳橙砧纽荷尔、晚棱和卡拉卡拉脐橙为试材,研究叶片解剖特征与气体交换参数的相关性。结果表明:纽荷尔脐橙叶片CO2和水分利用率最高,卡拉卡拉脐橙次之,晚棱脐橙最低;叶片CO2同化速率和水分利用率与叶片厚度、角质厚度极显著正相关,与栅栏组织厚度和海绵组织厚度显著正相关,与气孔密度极显著负相关。认为,高温环境下,高光效和水分利用率的脐橙品种具有较厚的叶片、角质层和较低的气孔密度。
The relationship between leaf anatomical characteristics and gas exchange parameters was studied using New Zealand Orange, New Zealand Orange, Caulis Caragana and orange leaves as test materials. The results showed that: Newhall navel orange leaves had the highest CO 2 and water use efficiency, followed by Caracal navel orange and lowest late orange navel orange. The leaf CO2 assimilation rate and water use efficiency were significantly and positively correlated with leaf thickness and thickness, Sponge tissue thickness was significantly and positively correlated with stomatal density was significantly negatively correlated. It is considered that the umbilical orange varieties with high light efficiency and water use efficiency have thicker leaves, stratum corneum and lower stomatal density under high temperature environment.