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The vase life of cut flowers is largely affected by post-harvest water loss. Cuticular wax is the primary barrier to uncontrolled water loss for aerial plant organs. Studies on leaf cuticular transpiration have been widely conducted; however, little is known about cuticular transpiration in flowers. Here, the cuticular transpiration rate and wax composition of three lily cultivars were determined. The minimum water conductance of tepal cuticles was higher at the green bud than open flower stage. Lily cuticular transpiration exhibited cultivar- and organ-specific differences, where transpiration from the tepals was higher than leaves and was higher in the ‘Huang Tianba’ than ‘Tiber’ cultivar. The overall wax coverage of the tepals was higher compared to that of the leaves. Very-long-chain aliphatics were the main wax constituents and were dominated by n-alkanes with carbon (C) chain lengths of C27 and C29, and C29 and C31 in the tepal and leaf waxes, respectively. Primary alcohols and fatty acids as well as small amounts of alkyl esters, ketones, and branched or unsaturated n-alkanes were also detected in both tepal and leaf waxes, depending on the cultivar and organ. In addition, the chain-length distributions were similar between compound classes within cultivars, whereas the predominant C-chain lengths were substantially different between organs. This suggests that the less effective transpiration barrier provided by the tepal waxes may result from the shorter C-chain aliphatics in the tepal cuticle, compared to those in the leaf cuticle. These findings provide further insights to support the exploration of potential techniques for extending the shelf life of cut flowers based on cuticular transpiration barrier properties.

The research aimed to study absorption and reduction of PM2s by different plant community structure, and explore which plant community can have better or best comprehensive absorption efficiency, thereby improving and optimizing urban vegetation structure, further promoting improvement of urban air quality, improving people's quality of life, and ensuring a good living environment. In this paper, the method of quadrat survey commonly used in field survey was adopted to record the height, coverage, DBH and other indicators of statistical plants, and corresponding comprehensive value was calculated through these indexes. PM2 s was measured at forest edge, 4 and 8 m in the forest, with three repetitions. Subtraction amount of PM2 s determined at different layers was analyzed, as well as its relationship with comprehensive value of community structure. The results showed that PM2J amount decreased significantly at forest edge, 4 and 8 m in the forest, and better community structure had a positive effect on PM2 s absorption. The higher the comprehensive indexes of community structure such as plant height, DBH (arbor), density and coverage, the better the ability of absorbing and reducing PM2 j. Therefore, it must pay attention to the diversity of plant species per unit area, to build a good plant community structure, which could better improve structure of local ecosystem, and play a good role in absorbing and reducing PM2S pollutants in the atmosphere. [ABSTRACT FROM AUTHOR]

The research aimed to study absorption and reduction of PM2s by different plant community structure, and explore which plant community can have better or best comprehensive absorption efficiency, thereby improving and optimizing urban vegetation structure, further promoting improvement of urban air quality, improving people's quality of life, and ensuring a good living environment. In this paper, the method of quadrat survey commonly used in field survey was adopted to record the height, coverage, DBH and other indicators of statistical plants, and corresponding comprehensive value was calculated through these indexes. PM2 s was measured at forest edge, 4 and 8 m in the forest, with three repetitions. Subtraction amount of PM2 s determined at different layers was analyzed, as well as its relationship with comprehensive value of community structure. The results showed that PM2J amount decreased significantly at forest edge, 4 and 8 m in the forest, and better community structure had a positive effect on PM2 s absorption. The higher the comprehensive indexes of community structure such as plant height, DBH (arbor), density and coverage, the better the ability of absorbing and reducing PM2 j. Therefore, it must pay attention to the diversity of plant species per unit area, to build a good plant community structure, which could better improve structure of local ecosystem, and play a good role in absorbing and reducing PM2S pollutants in the atmosphere. [ABSTRACT FROM AUTHOR]