Similar geometric rules govern the distribution of veins and stomata in petals, sepals and leaves

The New Phytologist
Feng-Ping ZhangTimothy J Brodribb

Abstract

Investment in leaf veins (supplying xylem water) is balanced by stomatal abundance, such that sufficient water transport is provided for stomata to remain open when soil water is abundant. This coordination is mediated by a common dependence of vein and stomatal densities on cell size. Flowers may not conform to this same developmental pattern if they depend on water supplied by the phloem or have high rates of nonstomatal transpiration. We examined the relationships between veins, stomata and epidermal cells in leaves, sepals and petals of 27 angiosperms to determine whether common spacing rules applied to all tissues. Regression analysis found no evidence for different relationships within organ types. Both vein and stomatal densities were strongly associated with epidermal cell size within organs, but, for a given epidermal cell size, petals had fewer veins and stomata than sepals, which had fewer than leaves. Although our data support the concept of common scaling between veins and stomata in leaves and flowers, the large diversity in petal vein density suggests that, in some species, petal veins may be engaged in additional functions, such as the supply of water for high cuticular transpiration or for phloem delivery of wa...Continue Reading

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May 5, 2017·Proceedings. Biological Sciences·Feng-Ping Zhang, Timothy J Brodribb

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Citations

Feb 16, 2019·The New Phytologist·Adam B RoddyCraig R Brodersen
Apr 30, 2019·The New Phytologist·Mark E Olson, Jarmila Pittermann
Jun 17, 2020·Plant, Cell & Environment·Mengying ZhongJohannes H C Cornelissen
Mar 3, 2019·Journal of Experimental Botany·Ailbhe J Brazel, Diarmuid S Ó'Maoiléidigh
Nov 2, 2020·Journal of Experimental Botany·Yang XiangAying Zhang
Jun 18, 2021·Frontiers in Plant Science·Feng-Ping ZhangShi-Bao Zhang
Oct 28, 2021·Plant, Cell & Environment·Beatrice L Harrison DayTimothy J Brodribb

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