Jeffries D L, Link S O, Klopatek J M
Division of Science and Mathematics, University of the Ozarks, Clarksville, Arkansas 72830.
Pacific Northwest Laboratory, Richland, Washington 99352.
New Phytol. 1993 Sep;125(1):163-173. doi: 10.1111/j.1469-8137.1993.tb03874.x.
The relationship between carbon dioxide exchange of Microcoleus- and Scytonema-dominated cryptogamic crusts and resaturation time was measured in the laboratory with a modified discrete sampling technique and infrared gas analysis. Maximum net photosynthetic rate of Microcoleus was 187 nmol CO m s and of Scytonema was 111 nmol CO m s for rehydration to 100% soil saturation. Both crust types demonstrated a slow rise in resaturation respiration and took 2 days to become fully active after the (first rehydration to 100% soil saturation after long-term dryness, and only one day to become active after the second rehydration cycle.
在实验室中，采用改良的离散采样技术和红外气体分析法，测量了以微鞘藻属和席藻属为主的隐花植物结皮的二氧化碳交换与再饱和时间之间的关系。微鞘藻属的最大净光合速率为187 nmol CO₂ m⁻² s⁻¹，席藻属的最大净光合速率为111 nmol CO₂ m⁻² s⁻¹，复水至土壤饱和度100%时达到此速率。两种结皮类型的再饱和呼吸均呈缓慢上升趋势，在长期干燥后首次复水至土壤饱和度100%后，需要2天才能完全恢复活性，而在第二次复水循环后仅需1天就能恢复活性。
