The role of calcium in growth induced by indole-3-acetic acid and gravity in the leaf-sheath pulvinus of oat ( Avena sativa )
dc.contributor.author | Ghosheh, Najati S. | en_US |
dc.contributor.author | Burg, James | en_US |
dc.contributor.author | Kaufman, Peter B. | en_US |
dc.contributor.author | Brock, Thomas G. | en_US |
dc.date.accessioned | 2006-09-11T17:09:45Z | |
dc.date.available | 2006-09-11T17:09:45Z | |
dc.date.issued | 1992-03 | en_US |
dc.identifier.citation | Brock, Thomas G.; Burg, James; Ghosheh, Najati S.; Kaufman, Peter B.; (1992). "The role of calcium in growth induced by indole-3-acetic acid and gravity in the leaf-sheath pulvinus of oat ( Avena sativa )." Journal of Plant Growth Regulation 11(2): 99-103. <http://hdl.handle.net/2027.42/45927> | en_US |
dc.identifier.issn | 1435-8107 | en_US |
dc.identifier.issn | 0721-7595 | en_US |
dc.identifier.uri | https://hdl.handle.net/2027.42/45927 | |
dc.identifier.uri | http://www.ncbi.nlm.nih.gov/sites/entrez?cmd=retrieve&db=pubmed&list_uids=11536939&dopt=citation | en_US |
dc.description.abstract | Leaf-sheath pulvini of excised segments from oat ( Avena sativa L.) were induced to grow by treatment with 10 μM indole-3-acetic acid (IAA), gravistimulation, or both, and the effects of calcium, EGTA, and calcium channel blockers on growth were evaluated. Unilaterally applied calcium (10 mM CaCl 2 ) significantly inhibited IAA-induced growth in upright pulvini but had no effect on growth induced by either gravity or gravity plus IAA. Calcium alone had no effect on upright pulvini. The calcium chelator EGTA alone (10 mM) stimulated growth in upright pulvini. However, EGTA had no effect on either IAA-or gravity-induced growth but slightly diminished growth in IAA-treated gravistimulated pulvini. The calcium channel blockers lanthanum chloride (25 mM), verapamil (2.5 mM), and nifedipine (2.5 mM) greatly inhibited growth as induced by IAA (⩾50% inhibition) or IAA plus gravity (20% inhibition) but had no effect on gravistimulated pulvini. Combinations of channel blockers were similar in effect on IAA action as individual blockers. Since neither calcium ions nor EGTA significantly affected the graviresponse of pulvini, we conclude that apoplastic calcium is unimportant in leaf-sheath pulvinus gravitropism. The observation that calcium ions and calcium channel blockers inhibit IAA-induced growth, but have no effect on gravistimulated pulvini, further supports previous observations that gravistimulation alters the responsiveness of pulvini to IAA. | en_US |
dc.format.extent | 462471 bytes | |
dc.format.extent | 3115 bytes | |
dc.format.mimetype | application/pdf | |
dc.format.mimetype | text/plain | |
dc.language.iso | en_US | |
dc.publisher | Springer-Verlag; Springer-Verlag New York Inc. | en_US |
dc.subject.other | Forestry | en_US |
dc.subject.other | Agriculture | en_US |
dc.subject.other | Life Sciences | en_US |
dc.subject.other | Cell Biology | en_US |
dc.subject.other | Plant Sciences | en_US |
dc.title | The role of calcium in growth induced by indole-3-acetic acid and gravity in the leaf-sheath pulvinus of oat ( Avena sativa ) | en_US |
dc.type | Article | en_US |
dc.subject.hlbsecondlevel | Molecular, Cellular and Developmental Biology | en_US |
dc.subject.hlbtoplevel | Science | en_US |
dc.subject.hlbtoplevel | Health Sciences | en_US |
dc.description.peerreviewed | Peer Reviewed | en_US |
dc.contributor.affiliationum | Department of Biology, University of Michigan, 48109, Ann Arbor, Michigan, USA; Department of Pediatrics, University of Michigan, 7500 Medical Science Research Building I, 48109-0648, Ann Arbor, MI, USA | en_US |
dc.contributor.affiliationum | Department of Biology, University of Michigan, 48109, Ann Arbor, Michigan, USA | en_US |
dc.contributor.affiliationum | Department of Biology, University of Michigan, 48109, Ann Arbor, Michigan, USA | en_US |
dc.contributor.affiliationother | Biology Department, Eastern Michigan University, 48197, Ypsilanti, Michigan, USA | en_US |
dc.contributor.affiliationumcampus | Ann Arbor | en_US |
dc.identifier.pmid | 11536939 | en_US |
dc.description.bitstreamurl | http://deepblue.lib.umich.edu/bitstream/2027.42/45927/1/344_2004_Article_BF00198021.pdf | en_US |
dc.identifier.doi | http://dx.doi.org/10.1007/BF00198021 | en_US |
dc.identifier.source | Journal of Plant Growth Regulation | en_US |
dc.owningcollname | Interdisciplinary and Peer-Reviewed |
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