חיפוש מתקדם
Physiologia Plantarum
Chae, S.H., Center for Research on Wild Plants, Utsunomiya University, 350 Mine-machi, Utsunomiya 321-8505, Japan
Yoneyama, K., Center for Research on Wild Plants, Utsunomiya University, 350 Mine-machi, Utsunomiya 321-8505, Japan
Takeuchi, Y., Center for Research on Wild Plants, Utsunomiya University, 350 Mine-machi, Utsunomiya 321-8505, Japan
Joel, D.M., Department of Weed Research, Agricultural Research Organization, Newe-Ya'ar Research Center, PO Box 1021, Ramat-Yishay 30095, Israel
Fluridone and norflurazon, two carotenoid-biosynthesis inhibitors, shortened the conditioning period required by seeds of Orobanche minor in order to respond to the germination stimulant strigol. Neither fluridone nor norflurazon alone induced seed germination of O. minor, they promoted strigol-induced germination. In addition, these compounds restored the conditioning and germination of seeds at a supraoptimal temperature (30°C) as well as in the light. Gibberellic acid (GA3) showed similar promotive and protective effects on the conditioning and germination of O. minor seeds. Although fluridone and norflurazon are known to prevent abscisic acid (ABA)-biosynthesis, and stresses such as supraoptimal temperatures have been reported to induce ABA accumulation in plants, the amount of ABA in the seeds or that released from the seeds into the conditioning media was not affected by the fluridone treatment and by exposure to the supraoptimal temperature. These results indicate that the promotive and protective effects of fluridone and norflurazon on the conditioning and germination of O. minor seeds would be attributed to other perturbations rather than the inhibition of ABA-biosynthesis.
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Fluridone and norflurazon, carotenoid-biosynthesis inhibitors, promote seed conditioning and germination of the holoparasite Orobanche minor
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Chae, S.H., Center for Research on Wild Plants, Utsunomiya University, 350 Mine-machi, Utsunomiya 321-8505, Japan
Yoneyama, K., Center for Research on Wild Plants, Utsunomiya University, 350 Mine-machi, Utsunomiya 321-8505, Japan
Takeuchi, Y., Center for Research on Wild Plants, Utsunomiya University, 350 Mine-machi, Utsunomiya 321-8505, Japan
Joel, D.M., Department of Weed Research, Agricultural Research Organization, Newe-Ya'ar Research Center, PO Box 1021, Ramat-Yishay 30095, Israel
Fluridone and norflurazon, carotenoid-biosynthesis inhibitors, promote seed conditioning and germination of the holoparasite Orobanche minor
Fluridone and norflurazon, two carotenoid-biosynthesis inhibitors, shortened the conditioning period required by seeds of Orobanche minor in order to respond to the germination stimulant strigol. Neither fluridone nor norflurazon alone induced seed germination of O. minor, they promoted strigol-induced germination. In addition, these compounds restored the conditioning and germination of seeds at a supraoptimal temperature (30°C) as well as in the light. Gibberellic acid (GA3) showed similar promotive and protective effects on the conditioning and germination of O. minor seeds. Although fluridone and norflurazon are known to prevent abscisic acid (ABA)-biosynthesis, and stresses such as supraoptimal temperatures have been reported to induce ABA accumulation in plants, the amount of ABA in the seeds or that released from the seeds into the conditioning media was not affected by the fluridone treatment and by exposure to the supraoptimal temperature. These results indicate that the promotive and protective effects of fluridone and norflurazon on the conditioning and germination of O. minor seeds would be attributed to other perturbations rather than the inhibition of ABA-biosynthesis.
Scientific Publication
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