红光,远红光和植物激素对水稻幼苗生长及CAT,POX活性的影响

红光(R)和远红光(Fr)都抑制水稻胚芽的生长,但对胚芽鞘来说,红光抑制其生长,远红光表现出部分逆转效应。一定浓度单一生长素(IAA)促进水稻胚芽鞘的生长,而赤霉素(GA_3)与生长素作用相反。对于水稻的过氧化氢酶(CAT)、过氧化物酶(POX),红光促进两种酶的活性,远红光则表现出逆转效应。单一10~(-2)ppmIAA、10~(-2)ppmGA_3都促进其活性。照光时,在10~(-2)ppm IAA存在的条件下,红光表现为促进,远红光则表现为抑制;但在10~(-2)ppm GA_3存在的条件下,红光反而对两种酶的活性有抑制作用,远红光则表现为促进作用。

EFFECT OF RED OR FAR-RED LIGHT AND PLANT HORMONE ON THE GROWTH AND ACTIVITY OF CAT, POX IN SEEDING OF RICE

Both Red(R) and Far-red light(Fr) inhibit the growth of embryonic bud of rice As for embryonic bud sheath, R inhibits its growth, Fr shows partial reversible effect. The single IAA of certain concentration encourages the growth of sheath, but the effect of GA_3 is opposite to that of IAA. As far as CAT and POX of rice is concerned, R encourages their activity, however, Fr shows the effect of reversibility. Both the single 10~(-2) ppm IAA and the single 10~(-2) ppm GA_3 encourage the activity of CAT and POX. The result that plant hormone and light are given simultaneously is complex. In 10~(-2) ppm IAA, R shows its encouragement, while Fr shows its inhibition; but in 10~(-2) ppm GA_3, on the contrary, R inhibits their activity and Fr demonstrates its encouragement.