2007
DOI: 10.1017/s0021859607007575
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The contribution of the gibberellin-insensitive semi-dwarfing (Rht) genes to genetic variation in wheat seedling growth in response to osmotic stress

Abstract: SU MMARYThe effects of various gibberellin-insensitive semi-dwarfing (Rht) alleles and background genotypes on the growth response of wheat seedlings to simulated low water potential were investigated. Four sets of near-isogenic lines, each consisting of six members (Rht-B1a+Rht-D1a (rht), Rht-B1b, RhtB1c, Rht-D1b, Rht-B1b+Rht-D1b and Rht-B1c+Rht-D1b), and one set of five members (rht, RhtB1b, Rht-B1c, Rht-B1d and Rht-D1b) were germinated in the presence of polyethylene glycol (PEG). The growth responses were … Show more

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Cited by 17 publications
(19 citation statements)
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“…It was shown in our earlier study that growth of Rht‐B1c dwarf seedlings was more strongly restrained under stress than that of the tall counterpart Rht‐B1a having relatively greater growth potential (Landjeva et al. ). Essentially, growth inhibition might have adaptive significance under stress as smaller plants have lower requirements for resources and are thereby able to survive in adverse environments where resources are limited (Harberd et al.…”
Section: Discussionmentioning
confidence: 93%
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“…It was shown in our earlier study that growth of Rht‐B1c dwarf seedlings was more strongly restrained under stress than that of the tall counterpart Rht‐B1a having relatively greater growth potential (Landjeva et al. ). Essentially, growth inhibition might have adaptive significance under stress as smaller plants have lower requirements for resources and are thereby able to survive in adverse environments where resources are limited (Harberd et al.…”
Section: Discussionmentioning
confidence: 93%
“…Following stress, the seedlings growth was more strongly restrained in the presence of the severe dwarfing allele Rht‐B1c than in the tall ( Rht‐B1a ) or the semidwarf ( Rht‐B1b ) genotypes having relatively greater growth potential (Landjeva et al. ). These earlier results suggest that better tolerance of dwarf plants is derived from their relatively smaller size and slower growth rate.…”
Section: Introductionmentioning
confidence: 99%
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“…The symptoms of drought stress, salinity or low temperature are mainly caused by osmotic stress and result from limited water absorption (Caruso et al 2008). Application of polyethylene glycol (PEG), a non-toxic and nonpenetrating, osmotically active polymer, is a successful laboratory simulation of drought stress (Kocheva et al 2005;Landjeva et al 2008). In these laboratory tests, the osmotic potential of the medium can be easily controlled and much of the environmental noise associated with field experiments can be avoided (Kocheva et al 2009).…”
Section: Introductionmentioning
confidence: 99%
“…Final coleoptile length is under the control of many genes and regulated by environment. The expression of these genes is differentially affected by the drought stress applied [2]. Heat-stress was associated with a decrease in the rate of growth and in the final length of barley and wheat coleoptiles [3,4] Osmotic adjustment is becoming increasingly recognised as an efficient drought tolerance mechanism in cultivated plants [5,6], exerting a positive effect-either directly or indirectly-on the productivity of plants that grow under drought conditions [7].…”
Section: Introductionmentioning
confidence: 99%