Carbon balance in relation to drying in four epiphytic mosses growing in different vertical ranges
Carbon balance in relation to drying in four epiphytic mosses growing in different vertical ranges
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不同垂直范围生长的四种附生苔藓的碳平衡与干燥的关系
DOI：
10.1139/b79-249
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发表时间：
1979
期刊：
影响因子：
--
通讯作者：
K. Mott
中科院分区：
文献类型：
--
作者：
P. Tobiessen;N. Slack;K. Mott
在干燥梯度生境中测量了四种附生苔藓的光合作用和呼吸对干燥的响应，这四种苔藓包括 Ulota Cripa (Hedw.) Brid.、Neckera pennata Hedw.、Anomodon rugellii (C. Mull.) Keissl. 和 Plagiomnium cuspidatum (Hedw.) T. Kop.。这些苔藓的反应几乎没有差异。苔藓中含水量与水势的关系确实有所不同，兼性附生植物 Plagiomnium 显示出更多中湿物种的典型响应，而其他三种则显示出更耐旱的响应，即，直到 Ulota、Neckera 和 Anomodon 达到较低的含水量后，水势才开始急剧下降。所有四种苔藓物种的光合作用和呼吸作用都对适度的水分胁迫非常敏感。
The response of photosynthesis and respiration to drying was measured in four species of epiphytic mosses, Ulota crispa (Hedw.) Brid., Neckera pennata Hedw., Anomodon rugellii (C. Mull.) Keissl., and Plagiomnium cuspidatum (Hedw.) T. Kop., from habitats along a desiccation gradient. There was little difference among the mosses in these responses. The relationship of water content to water potential did differ among the mosses, with Plagiomnium, the facultative epiphyte, showing a typical response of more mesic species and the other three showing a more xeric response, i.e., water potential does not begin to fall steeply until a lower water content is reached in Ulota, Neckera, and Anomodon. Both photosynthesis and respiration in all four moss species were quite sensitive to moderate water stress.