Regulation of Spikelet Development in Rice by Hormones

Patel, Rajesh; Mohapatra, Pravat K.

doi:10.1093/jxb/43.2.257

Cited by 38 publications

(29 citation statements)

References 9 publications

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“…On the contrary, Langer et al (1973) proposed that kinetin stimulates lateral bud growth in wheat because of the improvement in assimilate partitioning within the shoot to the axillary site. Our own work on rice (Patel and Mohapatra 1992) identified kinetin as the key growth regulator for spikelet development in rice panicle; it increased assimilate partitioning and improved grain filling on all branches. IAA application, however, improved assimilates partitioning to the distal branches at the cost of development of the proximal branches of the panicle (Patel and Mohapatra 1992).…”

Section: Discussionmentioning

confidence: 99%

“…Three growth regulators: IAA, kinetin (6-furfuryl amino purine) and GA 3 were dissolved in 0.5 cm 3 acetone, 0.1 N NaOH and ethanol, respectively, and diluted with distilled water (Patel and Mohapatra 1992) to a concentration of 100 mmol m -3 and applied by the help of a sprayer (5 ml per plant) at the early tillering (two-tillered) stage in between 8.00-9.00 A.M. The concentration of dissolving solvents was too low for any physiological effect on the plants.…”

Section: Growth Regulator Treatmentsmentioning

confidence: 99%

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Hormonal regulation of tiller dynamics in differentially-tillering rice cultivars

Kariali

Mohapatra

2007

Plant Growth Regul

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Tiller number can contribute significantly to yield potential of rice, but little knowledge is available on hormonal regulation of tillering and tiller dynamics. In the present study, Indole-3-acetic acid (IAA), kinetin (6-furfuryl amino purine) and Gibberellic acid (GA 3 ) treatments have been applied at the early tillering stage to two rice cultivars that contrast for tiller number. The responses of the hormones were studied on growth, development, grain yield, senescence patterns, assimilate concentration of the panicle and ethylene production in different classes of tillers. The leaf area, panicle grain number, fertility percentage and grain yield of tillers were higher in the low-tillering cultivar than that of high-tillering cultivar; the treatment of kinetin was more effective in the latter than in the former. High ethylene production was responsible for reduction of growth duration and grain yield of the tillers. Kinetin application reduced ethylene production of the latetillers significantly for the benefit of grain yield.

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Section: Discussionmentioning

confidence: 99%

Section: Growth Regulator Treatmentsmentioning

confidence: 99%

Hormonal regulation of tiller dynamics in differentially-tillering rice cultivars

Kariali

Mohapatra

2007

Plant Growth Regul

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“…ed PBs and spikelets would be determined by nutritional conditions such as the amount of N and assimilates under the control of phytohormones such as gibberellins and cytokinins. The organogenesis related to N and assimilate dynamics is thought to be controlled by a hormonal balance between auxin, gibberellin, and cytokinin (Woolley and Wareing, 1972;Patel and Mohapatra, 1992). Further research on the relationship between.…”

Section: Discussionmentioning

confidence: 99%

Relationship between Apical Dome Diameter at Panicle Initiation and the Size of Panicle Components in Rice Grown under Different Nitrogen Conditions during the Vegetative Stage

Kobayasi

Horie

Imaki

2002

Plant Production Science

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“…The content of gibberellic acid in rice plants is influenced by shading (Osada et al, 1973), and exogenous gibberellin increases spikelet number per panicle (Matsuba, 1991). Patel and Mohapatra ( 1992) speculated that spikelet development in rice is regulated by hormonal balance among auxin, gibberellin, and cytokinin. The organogenesis related with N and NSC dynamics is thought to be controlled by a hormonal balance between auxin, gibberellin, and cytokinin (Woolley and Wareing, 1972;Patel and Mohapatra, 1992).…”

Section: Discussionmentioning

confidence: 99%

“…Patel and Mohapatra ( 1992) speculated that spikelet development in rice is regulated by hormonal balance among auxin, gibberellin, and cytokinin. The organogenesis related with N and NSC dynamics is thought to be controlled by a hormonal balance between auxin, gibberellin, and cytokinin (Woolley and Wareing, 1972;Patel and Mohapatra, 1992). Further research on the interaction between N and NSC through hormonal regulations in spikelet differentiation is needed.…”

Section: Discussionmentioning

confidence: 99%