| | 1 | Author
| R. E. Wilkinson, R. R. Duncan | Requires cookie* | | | Title
| Oxabetrinil Reversal of Metolachlor and Acid Soil Stress  | | | | Abstract
| M etolachlor and excess M n:+ (acid soil stress) induce alterations in gibberellin precursor biosynthesis that can explain the morphological responses to these physiological stresses. O xa betrinil protects sorghum [Sorghum bicolor (L.) Moench] from the influence o f metolachlor and excess M n2+. Sorghum cultivar variations in response to excess M n2+ are explicable as dif ferential rates o f tvjf-kaurene biosynthesis between acid soil sensitive and tolerant cultivars. Concentrations o f M n2+ present in vegetative leaves and reproductive stem tissues were not different. Therefore, cultivar differences in e«/-kaurene biosynthesis explain the acid soil toler ance differences rather than differential M n2+ absorption, translocation, and/or compartmen-tation. M etolachlor and safener responses are found in cellular compartments and tissues that do not match a decreased herbicide concentration through absorption, transport, or degrada tion as a sole mode o f action for safeners. | | | |
Reference
| Z. Naturforsch. 46c, 950 (1991); received March 26 1991 | | | |
Published
| 1991 | | | |
Keywords
| Oxabetrinil, M etolachlor, Acid Soil Stress, Manganese, Isoprenoid Synthesis | | | |
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| default:Reihe_C/46/ZNC-1991-46c-0950.pdf | | | | Identifier
| ZNC-1991-46c-0950 | | | | Volume
| 46 | |
| 2 | Author
| Koshi Saito | Requires cookie* | | | Title
| Acceleration of Enzyme-Dependent Carthamin Formation by Manganese with Diversed Valence States | | | | Abstract
| Effect of manganese with three different valence states on carthamin formation was studied by using freshly collected flowers from dyer's saffron (C. tinctorius) capitula. A t 1 -10 hm con centration, these cations accelerated markedly the carthamin formation induced by endoge nous enzyme(s) in the detached floral tissues. The acceleration was obviously dependent on the valence state o f the test metals, more pronounced by M n (V II) or M n (III) than by M n (II) at a series o f given ionic strengths. O n a 1 |aM level, M n (V II) and M n (III) accelerated the pigment accumulation by faster o f 9 and 8, resp. than M n (II) during 5 min incubation at 30 °C. M n (V II) and M n (III) acted on both fresh and boiled florets, while M n (II) exerted preferential ly its activity on intact materials. Possible im plication of manganese ions on the enzyme-cata-lyzed carthamin formation are discussed. | | | |
Reference
| Z. Naturforsch. 46c, 1011—1016 (1991); received M ay 28/July 25 1991 | | | |
Published
| 1991 | | | |
Keywords
| Carthamus tinctorius, Cartham in Form ation, Manganese, Diversed Valence State | | | |
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| default:Reihe_C/46/ZNC-1991-46c-1011.pdf | | | | Identifier
| ZNC-1991-46c-1011 | | | | Volume
| 46 | |
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