Comparative profiles of the cuticular chemicals and transpiration barrier properties in various organs of Chinese flowering cabbage and Chinese kale

Plant cuticle as hydrophobic barrier covers almost all aerial plant organs. Herein the cuticular chemical components and the transpiration of various organs of Chinese flowering cabbage (CFC) and Chinese kale (CK) were comprehensively characterized. Numerous species‐ and organ‐specific differences i...

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Bibliographic Details
Published in:Physiologia plantarum 2022-03, Vol.174 (2), p.e13650-n/a
Main Authors: Huang, Hua, Hu, Ying, Wang, Ling, Li, Fengjun, Shan, Youxia, Lian, Qiaoqiao, Jiang, Yueming
Format: Article
Language:English
Subjects:
Alcohols
Alcohols - analysis
Aldehydes
Alkanes
Brassica
Brassica alboglabra
Brassica oleracea
Chemical composition
Chemicals
China
Crystals
Cuticular wax
Cutin
Dicarboxylic acids
Epicuticular wax
Fatty acids
Flowering
Hydrophobicity
Ketones
Leaves
Molecular chains
Monomers
Organs
Plant cuticle
Plant Epidermis - chemistry
Species
Surface properties
Transpiration
Waxes - chemistry
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Summary:Plant cuticle as hydrophobic barrier covers almost all aerial plant organs. Herein the cuticular chemical components and the transpiration of various organs of Chinese flowering cabbage (CFC) and Chinese kale (CK) were comprehensively characterized. Numerous species‐ and organ‐specific differences in morphological, chemical, and physiological levels were found. The various organs were relatively smooth in surface for CFC but glaucous with hollow tube‐ and plate‐type crystals for CK. The chemical composition of cuticular waxes were very‐long chain n‐alkanes, ketones, secondary alcohols with a prominent carbon chain of C29 in CK, primary alcohols dominated by C26, and aldehydes prominently C30 in CFC. Cutin monomers accumulated with similar levels as waxes and were dominated by α,ω‐dicarboxylic acids and fatty acids without added groups. The minimum water conductance differed considerably among species and various organs ranging between 8.9 × 10−5 (CK leaf) and 3.7 × 10−4 m s−1 (CFC leaf petiole). These differences in transpiration properties were proposed to be largely related to the cuticular chemicals in various organs and species. The presented results provide further insights to link the transpiration barrier functions with surface characteristics and cuticular chemicals.
ISSN:0031-9317
1399-3054
DOI:10.1111/ppl.13650