THE EFFECTS OF LOW GROWTH AND MEASUREMENT TEMPERATURE ON THE RESPIRATORY PROPERTIES OF 5 TEMPERATE SPECIES
THE EFFECTS OF LOW GROWTH AND MEASUREMENT TEMPERATURE ON THE RESPIRATORY PROPERTIES OF 5 TEMPERATE SPECIES
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DOI：
10.1093/oxfordjournals.aob.a087966
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发表时间：
1990-05-01
期刊：
影响因子：
4.2
通讯作者：
CUMMINS, WR
中科院分区：
文献类型：
--
作者：
COLLIER, DE;CUMMINS, WR
在10℃的控制条件下，生长5种温带草本植物：腺毛蕨（Epilobium glandulosum）、竹叶蕨（Matricaria matricarioides）、白木蕨（Melilotus alba）、松柏（Sonchus asper）和蒲公英（Taraxacum officinale）。和20.度。C.在10℃时测量呼吸。摄氏20度。C.在10℃下生长的植物的总暗呼吸速率。C的比率始终高于在20度下生长的植物。C.这是由于在寒冷生长的植物中，沿着细胞色素（kcn敏感）和替代（sham敏感）途径的呼吸活动更大。使用替代途径的能力在10度也更大。C种植植物。各途径相对贡献的增加具有物种特异性。在给定的生长温度下，在10摄氏度和20摄氏度的测量中，替代途径的活性变化不大。C.相比之下，细胞色素途径在20度时的活性更大。比在10度时测得的温度高。C.在10度时，替代途径的容量较低。C.这些结果表明细胞色素途径比其他途径对温度胁迫更敏感。
Five temperate ruderal species, Epilobium glandulosum, Matricaria matricariodes, Melilotus alba, Sonchus asper and Taraxacum officinale, were grown under controlled conditions at both 10.degree. and 20.degree. C. Respiration was measured at 10.degree. C and 20.degree. C. Total dark respiration rates of plants grown at 10.degree. C were consistently higher than the rates of plants grown at 20.degree. C. This was due to a greater respiratory activity along both the cytochrome (KCN-sensitive) and alternative (SHAM-sensitive) pathways in the cold grown plants. The capacity to use the alternative pathway was also greater in the 10.degree. C grown plants. The increase in the relative contribution of each pathway was species specific. At a given growth temperature the activity of the alternative pathway varied little between measurements at 10.degree.C and 20.degree. C. In contrast, the activity of the cytochrome pathway was greater when measured at 20.degree. C than when it was measured at 10.degree. C. The capacity of the alternative pathway was lower when measured at 10.degree. C. These results suggest that the cytochrome pathway is more sensitive to temperature stress than is the alternative pathway.