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Ross SD, Bollmann MP, Pharis RP, et al. Gibberellin A(4/7) and the Promotion of Flowering in Pinus radiata: Effects on Partitioning of Photoassimilate within the Bud during Primordia Diferentiation. Plant Physiol. 1984;76(2):326-30doi: 10.1104/pp.76.2.326.
Ross, S. D., Bollmann, M. P., Pharis, R. P., & Sweet, G. B. (1984). Gibberellin A(4/7) and the Promotion of Flowering in Pinus radiata: Effects on Partitioning of Photoassimilate within the Bud during Primordia Diferentiation. Plant physiology, 76(2), 326-30. https://doi.org/10.1104/pp.76.2.326
Ross, S D, et al. "Gibberellin A(4/7) and the Promotion of Flowering in Pinus radiata: Effects on Partitioning of Photoassimilate within the Bud during Primordia Diferentiation." Plant physiology vol. 76,2 (1984): 326-30. doi: https://doi.org/10.1104/pp.76.2.326
Ross SD, Bollmann MP, Pharis RP, Sweet GB. Gibberellin A(4/7) and the Promotion of Flowering in Pinus radiata: Effects on Partitioning of Photoassimilate within the Bud during Primordia Diferentiation. Plant Physiol. 1984 Oct;76(2):326-30. doi: 10.1104/pp.76.2.326. PMID: 16663841; PMCID: PMC1064286.
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Plant Physiol. 1984 Oct;76(2):326-30. doi: 10.1104/pp.76.2.326.

Gibberellin A(4/7) and the Promotion of Flowering in Pinus radiata: Effects on Partitioning of Photoassimilate within the Bud during Primordia Diferentiation.

Plant physiology

S D Ross, M P Bollmann, R P Pharis, G B Sweet

Affiliations

  1. Western Forestry Research Center, Weyerheuser Co., 505 North Pearl Street, Centralia, Washington 98531.

PMID: 16663841 PMCID: PMC1064286 DOI: 10.1104/pp.76.2.326

Abstract

Gibberellin A(4/7) mixture (GA(4/7)), a highly effective promoter of early and enhanced flowering in the Pinaceae, caused a significant reallocation of dry matter and (14)C-photosynthate within terminal buds of Pinus radiata D. Don within 8 days of hormone treatment. Treatment with GA(4/7) to terminal shoots of vigorous, potentially flowering mature grafted propagules reduced the flow of photoassimilated (14)C and dry matter into the terminal bud as a whole, but significantly increased the dry matter and (14)C allocated within the bud to developing long-shoot primordia (potential seed-cone buds). This was accomplished at the expense of the structural tissues, the apical dome region, and the vegetative branch buds. Although GA(3) caused a similar reallocation of dry matter within the terminal bud, it was significantly less effective than GA(4/7) thus appears to have, in addition to any nutrient diversion abilities, a distinct morphogenic function in sexual differentiation.

References

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  3. Plant Physiol. 1983 Feb;71(2):257-62 - PubMed
  4. Int J Appl Radiat Isot. 1972 Aug;23(8):361-9 - PubMed

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