山桐子雌、雄株叶片表皮微形态特征的比较研究
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中国林业科学研究院林木遗传育种全国重点实验室

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Q944.1

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院企合作专项


Comparison of the Leaf Epidermal Micromorphology between Female and Male Idesia polycarpa Maxim.
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    摘要:

    【目的】探究山桐子(Idesia polycarpa Maxim.)叶片表皮微形态特征及其雌、雄株差异,为该种质资源的挖掘利用提供参考。【方法】利用扫描电镜,对40份山桐子(雌、雄株各半)叶片进行微形态观察,测定12个气孔相关性状,并分析样品间的异同。【结果】(1)山桐子雌、雄株叶片的表皮毛、细胞形态、气孔特征及蜡质式样相似,其下表皮密布的类锥形纤维体型蜡质纹饰,鲜见于其它植物类群。(2)山桐子雌株叶片的气孔大小(长度、宽度、面积及周长)及密度相关参数均略大于雄株;雄株叶片的气孔开口相关参数(孔隙宽度、开口面积及气孔开度)均略高于雌株;但所有差异均未达到统计学显著水平(P > 0.05)。(3)多数气孔性状彼此显著相关,而气孔密度与其它性状关联较弱,可能受到相对独立的遗传调控。【结论】本研究首次明确了山桐子叶片表皮的微形态特征,其类锥形纤维体型蜡质式样可作为种质评鉴的关键依据,其气孔性状参数可为童期种苗的性别判定提供重要参考。

    Abstract:

    【Objective】The study aimed to explore the micromorphological characteristics of leaf epidermis of Idesia polycarpa Maxim. and compare differences between the female and male plants, and provide references for the mining and utilization of this germplasm resources. 【Methods】The leaf epidermal micro-configurations of 40 plants of I. polycarpa (half female and half male) were characterized with scanning electron microscopy. Meanwhile, 12 stomatal traits were measured, and the similarities and differences among samples were analyzed. 【Results】(1) The leaf epidermal hair, cell morphology, stomatal characteristics and wax pattern of both female and male I. polycarpa were similar. Its dense, conical conicoid-like wax covered on the abaxial epidermis was rarely observed in other plants. (2) The leaf stomatal size (length, width, area and perimeter) and density related parameters of female I. polycarpa were slightly higher than those of male samples. On the contrary, leaf stomatal pore related parameters (stomatal pore width, stomatal opening area and stomatal opening level) were slightly higher in male samples. But all differences were not statistically significant (P > 0.05). (3) Most stomatal traits were significantly correlated with each other, while stomatal density was rarely related with others and was supposed to be genetically regulated independently. 【Conclusion】The present study firstly expounded the leaf epidermal micromorphological characteristics of I. polycarpa, and indicated that the conical conicoid-like wax pattern could be used as a key basis for germplasm evaluation, and the stomatal parameters were of great significance for gender determination of its young seedlings.

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  • 收稿日期:2024-01-24
  • 最后修改日期:2024-03-18
  • 录用日期:2024-04-07
  • 在线发布日期: 2024-06-21
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