A Comparative Study on Leaf Traits and Anatomical Structures of‘Gold Delicious’Apple Collected from Different Habitats

doi:10.11924/j.issn.1000-6850.casb16040059

Abstract

Abstract: "Golden Delicious" apple leaves were used as material in Maoxian(Ⅰ), Yanyuan(Ⅱ) and Nyingchi (Ⅲ), the morphometric parameter, anatomical parameter and epidermal parameter were carried out by paraffin section and scanning electron microscope to study epidermal features, anatomical features and their response and adaptation to different habitats. The results showed that: The variation trend was consistent for leaf length , leaf width and leaf area, the trend was Yanyuan(Ⅱ) > Maoxian(Ⅰ)> Nyingchi (Ⅲ), the thickness of leaf showed a contrary tendency, the trend was Nyingchi (Ⅲ) > Maoxian(Ⅰ) > Yanyuan(Ⅱ); "Golden Delicious" apple leaf was bifacial leaf and the upper and lower epidermis composed of a layer of cells, there was clear difference between the palisade tissue and spongy tissue, and the thickness of leaf, palisade tissue and spongy tissue was biggest in Nyingchi (Ⅲ), followed by Yanyuan(Ⅱ), The minimμm thickness was in Maoxian(Ⅰ), the P/S ranged from 0.95 to 1.28, the P/S of leaf in Yanyuan(Ⅱ) was largest(1.28); Stomatas and epidermal hairs distributed in lower epidermis, The stomatal apparatus area was largest in Yanyuan(Ⅱ) (428.44 mm2), followed by Nyingchi (Ⅲ) (337.32mm2), The minimμm was in Maoxian(Ⅰ) (314.05mm2), the stomata density was maximμm in Maoxian(Ⅰ) (397.67.mm-2), followed by Nyingchi (Ⅲ) (389.mm-2), The minimμm was in Yanyuan(Ⅱ)( 332.67.mm-2 ); The epidermal hairs in Maoxian(Ⅰ) was more intensive at a average epidermal hairs of 20.67 per cubic millimeter, The epidermal hairs in Nyingchi (Ⅲ) and Yanyuan(Ⅱ) were relatively sparse, the stomatas were in a relatively open system.

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