关键词: 网络分析法, 可达性, 公园绿地

Abstract: Four species (Belosynapsis ciliata, Murdannia simplex, Murdannia loriformis and Callisia repens) from Commelinaceae were used as experimental materials to explore the effects of drought stress and rewatering on the leaf physiological and biochemical characteristics of leaf color, aiming to provide basis for plant cultivation and breeding. The results showed that the content of anthocyanin in Belosynapsis ciliata and Murdannia simplex significantly increased under drought stress, and decreased to some extent after rewatering. There was no change of anthocyanin content in Murdannia loriformis and Callisia repens. The chlorophyll content of four species increased first and then decreased, and increased after rewatering; but still lower than that in CK. The carotenoid content of Belosynapsis ciliata and Murdannia simplexincreased first and then decreased, while it increased first, decreased and then increased for the other two species. The total antioxidant capacity of Belosynapsis ciliata and Mrdannia simplex increased with drought stress, while that of Murdannia loriformis and Callisia repens increased first and then decreased. The chalcone isomerase activity of the four species increased first and then decreased, and it was nonlinearly related to anthocyanin content. The phenylalanine ammonia lyase activities of Belosynapsis ciliata and Murdannia simplex increased, while that of Murdannia loriformis and Callisia repens decreased. The soluble sugar content of Belosynapsis ciliata and Murdannia simplex decreased first and then increased under drought stress, while that of Murdannia loriformis and Callisia repens increased. The increases of malondialdehyde content in Murdannia loriformisand Callisia repens were much higher than that inBelosynapsis ciliata and Murdannia simplex.

Key words: network analysis method., accessibility, urban park