Environmental and Genetic Effects on Leaf Traits in Tobacco

Abstract

Abstract:

Leaf traits can indicate a plants′ function and response to the environment. Leaf functional traits are affected by both genes and the environment. We examined these effects on leaf traits in a Tobacco variety (Tabacum ‘K326’) planted at 11 different sites, and also on 12 different tobacco cultivars grown at one site. Our results showed that genetic variation had a larger impact on stomatal density and leaf thickness than stomatal length and vein density, while the environment had a greater effect on minor vein density and leaf thickness than stomatal length and stomatal density. At one site where temperature was high, Tabacum‘K326’ exhibited its highest minor leaf vein density.

Key words: Leaf structural traits, Temperature, Gene, Responses, Tobacco

摘要：

叶片性状很大程度上反映了植物的功能及其对环境的适应。叶片性状的变异受环境及遗传特性的影响，但是很多研究未能很好区分出它们的相对影响。本研究通过将同一烟草品种种植于不同地点来认识环境对烟草叶片性状的影响；将不同的烟草品种种植于同一环境来了解遗传差异对烟草叶片性状的影响。研究发现，叶脉密度和叶片厚度受环境的影响较大，气孔密度和长度受环境的影响较小。气孔密度和叶片厚度受遗传的影响较大，叶脉密度和气孔长度受遗传的影响较小。在生长温度高的地方，烟草叶脉密度越大。研究结果对于认识植物对环境的适应性具有重要意义。

关键词: 叶片结构, 环境, 遗传, 适应, 烟草

CLC Number:

Q 944
Q 948

HU Jing, YANG Qiu-Yun, YAN Ning, HU Hong. Environmental and Genetic Effects on Leaf Traits in Tobacco[J]. Plant Diversity, 2014, 36(01): 70-76.

胡静, 杨秋云, 严宁, 胡虹. 环境和遗传对烟草叶片结构的影响[J]. Plant Diversity, 2014, 36(01): 70-76.

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