1995 Fiscal Year Final Research Report Summary
ANALYTICAL STUDIES ON THE ADAPTATION TO ENVIRONMENTS IN CROP PLANTS USING GENETIC MUTANTS
| Project/Area Number |
05454044
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| Research Category |
Grant-in-Aid for General Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
作物学
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| Research Institution | TOHOKU UNIVERSITY |
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Principal Investigator |
SUGE Hiroshi Tohoku University, INSTITUTE OF GENETIC ECOLOGY,PROFESSOR, 遺伝生態研究センター, 教授 (00124587)
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| Co-Investigator(Kenkyū-buntansha) |
TAKAHASHI Hideyuki Tohoku University, INSTITUTE OF GENETIC ECOLOGY,ASSOCIATE PROFESSOR, 遺伝生態研究センター, 助教授 (70179513)
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| Project Period (FY) |
1993 – 1995
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| Keywords | MUTANT STRAINS / BARLEY / PEA / GRAVITROPISM / HYDROTROPISM / CALCIUM / TILLERING TYPE / UP-DOWN TREATMENT |
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| Research Abstract |
BARLEY MUTANT,SERPENTINA WAS FOUND TO LOSE THEIR ABILITY TO RESPOND GRAVITY AT THE STAGE OF FIRST LEAF ALTHOUGH THEIR COLEOPTILE CAN RESPOND TO GAVITY.WHEN BARLEY PLANTS WERE POSITIONED PU-SIDE DOWN,THE GROWTH WAS STIMULATED IN THE MUTANT STRAIN ALTHOUGH THAT OF NORMAL STRAIN WAS INHIBITED,SUGGESTING THE OCCURRENCE OF ANOTHER GRAVITY RESPONSE TNAN CURVATURE AND MORPHOGENESIS.EXPERIMENT WITH F-2 SEGREGANTS OF HYBRID BETWEEN NORMAL AND MUTANT AND OR MUTANT AND NORMAL STRAIN OF RICE,REVEALED THAT LAZY GENE INDUCE BOTH ON AGRAVITROPIC RESPONSE OF SEEDLINGS AND CONTRIBUTE TO THE SPREADING HABIT OF TILLER GROWTH.ROLE OF CALCIUM IN ROOT HYDROTROPISM WAS STUDIED WITH MODEL SYSTEM USING PEA GRAVITROPIC MUTANT AGEOTROPUM.WHEN A SORBITOL-CONTAINING AGAR BLOCK WAS UNILATERALLY APPLIED TO THE ROOT CAP,NORMAL HYDROTROPISM WAS INDUCED.THIS HYDROTROPISM WAS INHIBITED WITH THE EGTA,A CALCIUM CHELATOR.THIS INHIBITION WAS RECOVERD WITH THE SUBSTITUTION OF CALCIUM SOLUTION.ADDITION TO THIS,LANTHANUM,AN CHANNEL BLOCKER OF CALCIUM INHIBITED THE HYDROTROPIC CURVATURE.A CALCIUM IONOPHORE,ON THE OTHER HAND,PROMOTED HYDROTROPISM SUGGESTING THE TRANSPORT OF FREE CALCIUM INTO CELL INCREASES HYDROTROPISM.CALCIUM AT ROOT CAP WAS SUGGESTED TO HAVE ROLE IN THE PROCESS OF INFORMATION TRANSPOSITION AT THE SITE OF GRAVITY PERCEPTIION AND THEIR CALCIUM ACTION WAS CONSIDERED TO ACT VIA CELL WALL OF ROOT CAP.
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