Kuan Yang

Shanghai Chenshan Botanical Garden, Shanghai, 201602, China
Author    Correspondence author
Plant Gene and Trait, 2022, Vol. 13, No. 3   doi: 10.5376/pgt.2022.13.0003
Received: 08 Aug., 2022    Accepted: 12 Aug., 2022    Published: 20 Aug., 2022

This article was first published in Molecular Plant Breeding in Chinese, and here was authorized to translate and publish the paper in English under the terms of Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Yang K., 2022, Leaf anatomic structure and cold tolerance evaluation of 6 Nymphaea species, Plant Gene and Trait, 13(3): 1-9 (doi: 10.5376/pgt.2022.13.0003)

10 leaf anatomical indexes of 6 Nymphaea species were observed and measured, and the cold tolerance was evaluated by cluster analysis and membership function. The result showed that Nymphaea is of bifacial leaf, stomata are only distributed in upper epidermis, and the thickness of upper epidermis was smaller than that of lower epidermis. Leaf thickness has significant differences and Nymphaea potamophila had the most compact leaf structure while N.alba had the most loose. Through cluster analysis, 10 indicators were divided into 3 categories, and indicators with the largest correlation coefficients were leaf thickness, stomatal density andpalisade tissue-spongy tissue ratio, which were found to be the main factors to evaluate the cold resistance of different Nymphaea species. The order of the six species based on cold tolerance from strong to weak is N.alba＞N.potamophila＞N.lotus＞N.immutabilis＞N.colorata＞N.minuta.

Nymphaea; Leaf; Anatomic structure; Cold tolerance