Yelenosky G
United States Department of Agriculture, Science and Education Administration, Agricultural Research, Orlando, Florida 32803.
Plant Physiol. 1979 Sep;64(3):425-7. doi: 10.1104/pp.64.3.425.
Free proline increased in leaves of orange (Citrus sinensis [L.] Osb. cv. Valencia) and grapefruit (Citrus paradisi Macfad. cv. Star Ruby) trees on a wide range of citrus rootstocks during cold hardening. Increases in sugars accompanied proline accumulation. During cold hardening, the rate of proline accumulation was greater in old than in young leaves. In leaves of grapefruit trees kept in the dark during cold hardening, neither proline nor sugars increased and the degree of cold hardiness was less than in trees exposed to light. Like sugar accumulations, proline accumulation does not reflect specific degrees of cold hardiness in citrus cultivars.
在低温锻炼期间，多种柑橘砧木上的甜橙（Citrus sinensis [L.] Osb. cv. Valencia）和葡萄柚（Citrus paradisi Macfad. cv. Star Ruby）树叶片中的游离脯氨酸含量增加。脯氨酸积累的同时糖分也增加。在低温锻炼期间，老叶中脯氨酸的积累速率高于幼叶。在低温锻炼期间处于黑暗中的葡萄柚树叶片，脯氨酸和糖分均未增加，其抗寒程度低于光照下的树。与糖分积累一样，脯氨酸积累并不能反映柑橘品种特定的抗寒程度。
