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Science 22 December 1995:
Vol. 270. no. 5244, p. 1899
DOI:

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This Week in Science

Senescence of leaves is a normal part of plant development that produces autumn colors as well as suboptimal crop yields. Gan and Amasino (p. 1986) have found a way to inhibit the normal process, allowing leaves to remain on the plant and healthy for a longer time. The authors combined a promoter from a gene induced during normal senescence with a gene encoding an enzyme important in cytokinin synthesis. In response to senescence signals, transgenic plants expressing this hybrid gene produce small amounts of cytokinin, which in turn inhibit the senescence process. This system may be useful for increasing the longevity and productivity of certain crops.




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Science. ISSN 0036-8075 (print), 1095-9203 (online)