Intraspecific variation in the petal epidermal cell morphology of Vicia faba L. (Fabaceae).
Intraspecific variation in the petal epidermal cell morphology of Vicia faba L. (Fabaceae).
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DOI：
10.1016/j.flora.2018.06.005
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发表时间：
2018-07
期刊：
影响因子：
1.9
通讯作者：
Glover BJ
中科院分区：
文献类型：
--
作者：
Bailes EJ;Glover BJ
确定了蚕豆花瓣上圆锥形细胞的三种不同分布。最常见的表型存在于 28/32 的基因型中。从未观察到圆锥形细胞的完全损失或增加。在微观尺度上，花朵花瓣表皮细胞的形状和精细细胞浮雕在其与传粉媒介的相互作用中发挥着关键作用。特别是，圆锥形花瓣表皮细胞已被证明在提供对蜜蜂授粉花朵表面的抓握力方面具有重要功能，并且可以影响蜜蜂访问率。先前的研究已经探索了属和科内该性状的种间变异，但尚未全面研究自然发生的种内变异。在这里，我们研究了蚕豆作物 32 种基因型的花瓣表皮细胞形态，该作物的产量高度依赖于传粉媒介。我们假设，由于育种计划期间的选择性扫描或遗传漂变，圆锥形细胞可能在某些基因型中丢失。我们发现 13% 的品系具有圆锥形花瓣表皮细胞的分布，与蚕豆花中常见的分布不同。这些异常表型是花瓣的正面/背面特有的，表明这些变化是基因表达模式改变的结果，而不是基因功能丧失的结果。
Three different distributions of conical cells across Vicia faba petals were identified. The most common phenotype was present in 28/32 genotypes. Total loss or gain of conical cells was never observed. At a microscopic scale, the shape and fine cell relief of the petal epidermal cells of a flower play a key role in its interaction with pollinators. In particular, conical shaped petal epidermal cells have been shown to have an important function in providing grip on the surface of bee-pollinated flowers and can influence bee visitation rates. Previous studies have explored interspecific variation in this trait within genera and families, but naturally-occurring intraspecific variation has not yet been comprehensively studied. Here, we investigate petal epidermal cell morphology in 32 genotypes of the crop Vicia faba, which has a yield highly dependent on pollinators. We hypothesise that conical cells may have been lost in some genotypes as a consequence of selective sweeps or genetic drift during breeding programmes. We find that 13% of our lines have a distribution of conical petal epidermal cells that deviates from that normally seen in V. faba flowers. These abnormal phenotypes were specific to the ad/abaxial side of petals, suggesting that these changes are the result of altered gene expression patterns rather than loss of gene function.
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影响因子：
3.3
作者：
Ojeda, Dario I.;Valido, Alfredo;Santos-Guerra, Arnoldo
通讯作者：
Santos-Guerra, Arnoldo
影响因子：
7.4
作者：
Gorton, HL;Vogelmann, TC
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影响因子：
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通讯作者：
Glover, Beverley J.
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作者：
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通讯作者：
Connelly, Caitlin F.