tag:blogger.com,1999:blog-4513758271398962258.post3489832144912652982..comments2023-12-05T06:02:44.946+02:00Comments on The Daily Plant: The Harbinger of Summer's EndDaniel Chamovitzhttp://www.blogger.com/profile/17269065302481334622noreply@blogger.comBlogger2125tag:blogger.com,1999:blog-4513758271398962258.post-13165086752921479132012-09-03T07:42:32.179+03:002012-09-03T07:42:32.179+03:00Todd - you're definitely on your way to being ...Todd - you're definitely on your way to being a plant scientist!<br />The question of phytochrome action and memory is cutting edge research. And yes, hatzav has a large bulb underground. Actually a small tip remains at ground level. In any event red and far-red light still penetrates the earth fro several millimeters. that's how seeds know when to sprout!<br />Daniel Chamovitzhttps://www.blogger.com/profile/17269065302481334622noreply@blogger.comtag:blogger.com,1999:blog-4513758271398962258.post-88810942952393292892012-09-02T23:47:34.383+03:002012-09-02T23:47:34.383+03:00If I understand right, two questions emerge:
How d...If I understand right, two questions emerge:<br />How do "plants measure the time phytochromes are turned off"? One would expect some kind of memory here...<br />and,<br />if the hatzav has no leaves when it sends up its flower, ostensibly it would be all underground; how then does it notice spectral changes?<br />thanks!todd gilenshttp://www.follywog.comnoreply@blogger.com