Self-restraint

时间:2019-03-07 09:01:02166网络整理admin

A GENE that prevents plants from being fertilised by their own pollen has been found by biologists at Cornell University. Christel Schopfer and her colleagues found that kale (Brassica oleracea) expresses a gene for “S locus cysteine-rich protein” (SCR) in its anthers—the part of the flower that produces pollen. To test the effect of the gene, the researchers transferred the SCR gene from one kale plant to another. They found that the first plant would no longer accept pollen from the other (Science, vol 286,