热带亚热带植物学报2026，Vol.34Issue(3)：287-297,11.DOI:10.11926/jtsb.5025
5种蕨类植物的羽片与叶柄水力协调研究
Hydraulic Coordination Between Pinnae and Petioles in Five Fern Species
摘要
Abstract
To explore the hydraulic coordination mechanism between leaflets and petioles of ferns,the pressure-volume curves of leaflets of five fern species(Cyclosorus interruptus,Diplazium donianum,Nephrolepis cordifolia,Psilotum nudum and Pteris vittata)were measured,and the correlations between the morphological structures of leaflets and petioles and their hydraulic functions were analyzed.The results showed that the hydraulic efficiency[theoretical water conductivity of leaflets(Kleaf)and theoretical water conductivity of petioles(Kth)]and the hydraulic safety[water potential at the loss of turgor pressure(Ψtlp)]of Pteris vittata were higher than those of other species.The pinnae of D.donianum exhibited the highest water storage capacity[absolute water capacity(CT)and saturated water content(SWC)],but its safety was the lowest.Diplazium donianum had the most dense and smaller stomata and the highest minimum leaf surface conductance(gmin),while Psilotum nudum had the most sparse and larger stomata.The maximum theoretical stomatal conductance(gs,max)of Pteris vittata was higher than that of other species.The supply and consumption of water by petioles and leaflets of ferns were coordinated.The water supply function of petioles was significantly correlated with the stomatal traits.Higher Kth was accompanied by smaller and denser stomatal distribution and larger gs,max.In addition,gs,max was significantly positively correlated with the area of xylem in petiole)(P<0.05),and gmin is significantly positively correlated with SWC(P<0.05).The hydraulic efficiency was coordinated with hydraulic safety in pinnae(P<0.01),meaning that pinnae with higher Kleaf have more negative Ψtlp.This revealed the hydraulic coordination mechanism between pinnae and petioles of ferns,indicating that ferns achieve a dynamic balance between water transport efficiency and transpiration demand through structural-functional coordination.This adaptive strategy might enhance their adaptability to the environment.关键词
蕨类植物/解剖结构/水力协调机制/水力性状/功能性状Key words
Fern/Anatomical structure/Hydraulic coordination mechanism/Hydraulic trait/Functional trait引用本文复制引用
姚梅菊,许黎明,庞玉堃,张惠莹,蒋国凤..5种蕨类植物的羽片与叶柄水力协调研究[J].热带亚热带植物学报,2026,34(3):287-297,11.基金项目
国家自然科学基金项目(32460373) （32460373）
广西自然科学基金项目(2022GXNSFDA035059) （2022GXNSFDA035059）
亚热带农业生物资源保护与利用国家实验室开放课题(SKLCUSA-b201903) （SKLCUSA-b201903）
广西巴马县科技人才计划项目(巴人科20220011)资助 This work was supported by the National Natural Science Foundation of China(Grant No.32460373),the Project for Natural Science in Guangxi(Grant No.2022GXNSFDA035059),the Open Project of National Laboratory of Subtropical Agricultural Bioresources Conservation and Utilization(Grant No.SKLCUSA-b201903),and the Project for Science and Technology Talent in Bama County,Guangxi(Grant No.20220011). （巴人科20220011）
