Genetic and Photoperiodic Control of the Relative Rates of Reproductive and Vegetative Development in Peas

Kelly, Maureen O.; Davies, Peter J.

doi:10.1093/oxfordjournals.aob.a087181

Cited by 17 publications

(26 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Consistent with the elevated flux through the GA biosynthesis pathway that was seen for the internodes, we also observed, for two of the transgenic lines, an increased apical meristem life (more nodes per plant) and a delayed apical meristem transition from the vegetative phase to the reproductive phase (for TG1 and also for comparison of TG3 and C3, see Table III; Supplemental Table S1); the highest number of nodes was with TG1, the transgenic line with the highest level of PsGA3ox1 expression (Table I), as also noted by Kelly and Davies (1986) for G2 peas in short days, a condition associated with higher levels of GA 20 and GA 1 (Proebsting et al, 1978;Zhu and Davies, 1997). Proebsting et al (1978) demonstrated that application of GA 3 to the apical buds of G2 peas maintained apical growth and that the apical vigor observed in short days in these peas was correlated with the presence of a growth-active GA later shown by Zhu and Davies (1997) to be GA 1 .…”

Section: Cauliflower Mosaic Virus-35s Constitutive Promoter Expressiosupporting

confidence: 80%

Gibberellin 3-oxidase Gene Expression Patterns Influence Gibberellin Biosynthesis, Growth, and Development in Pea

et al. 2013

View full text Add to dashboard Cite

Section: Cauliflower Mosaic Virus-35s Constitutive Promoter Expressiosupporting

confidence: 80%

Gibberellin 3-oxidase Gene Expression Patterns Influence Gibberellin Biosynthesis, Growth, and Development in Pea

et al. 2013

View full text Add to dashboard Cite

“…The Sn gene retards flower development postinitiation (Kelly and Davies, 1986), an effect observed in this study. Apical senescence was delayed in the Sn line as measured by the period of node production and fruiting.…”

Section: Plant Developmentsupporting

confidence: 75%

“…The genetics of flowering in peas have been well characterized (Murfet, 1977), and some of the genes may affect flowering via primary effects on assimilate partitioning (Reid and Murfet, 1984;Kelly and Davies, 1986). Thus, they are a potential tool for understanding partitioning and are of particular interest since they may affect the regulation by the vegetative plant, one of the least understood aspects of assimilate partitioning.…”

Section: Effect Of Embryo Genotypementioning

confidence: 99%

Maternal, Single-Gene Regulation of Assimilate Partitioning in Pea

Kelly

Spanswick

1997

Plant Physiology

View full text Add to dashboard Cite

Assimilate partitioning has been identified as a key process i n the control of yield. Although the role of reproductive structures in this process has received intensive study, our understanding of the role of the maternal plant is limited. We suggest that the Sn gene of pea (Pisum sativum L.) is a potentially valuable genetic tool for studying maternal regulation of partitioning. In this study, nearly isogenic lines differing at the Sn locus were compared with respect to seed-filling characteristics and carbon assimilation. Lines with the Sn gene had a slower rate and shorter duration of seed growth than the line recessive for this gene, and these traits could not be ascribed to reduced carbon assimilation. Flowers of the two nearly isogenic lines were manually pollinated to control the genotype of the developing embryo independently of the maternal genotype. l h e final dry weight of the seed was determined by the genotype of the maternal plant and not by the genotype of the embryo, supporting the hypothesis that the Sn gene acts in the vegetative plant to regulate the partitioning of assimilates between vegetative and reproductive growth. Although the Sn gene has been noted for delaying apical senescence, it also delayed leaf senescence in this study; leaves of the Sn line continued to photosynthesize long past the time that leaves of the recessive line had senesced and after the seeds and pods were dry.

show abstract

“…The flower buds were removed using forceps under a binocular microscope. A single LD apical bud contained only 3 to 4 flower buds, whereas the same size SD apical bud contained 7 to 8 flower buds, although the flower buds from LD-grown plants were usually 2 to 3 times bigger than the flower buds from SD-grown plants (Kelly and Davies, 1986 mg/bud). The vegetative tissue (60-70 mg/ apex) consisted of the remainder of the apical bud, from which flower buds had been removed, excluding the lowest pair of stipules enfolding the apical bud and also the internode above the enfolding stipules.…”

Section: Plant Materialsmentioning

confidence: 99%

“…The delay of senescence in G2 peas correlates with a slower reproductive development under SD conditions (Kelly and Davies, 1986). Kelly and Davies (1988a) found that a higher percentage of leaf-exported carbon was transported to the apical bud and the leaf primordia within the apical bud and a lower percentage was transported to the young fruits and the flower buds within the apical bud under SD compared with LD conditions.…”

Section: The Relationship Among Hormonal Levels Nutrient Partitioninmentioning

confidence: 99%

The Control of Apical Bud Growth and Senescence by Auxin and Gibberellin in Genetic Lines of Peas

Zhu

Davies

1997

Plant Physiology

View full text Add to dashboard Cite

Pea (Pisum safivum L.) lines G2 (dwarf) and NCBl769 (tall) (Sn Hr) produce flowers and fruit under long (LD) or short (SD) days, but senesce only under LD. Endogenous gibberellin (CA) levels were inversely correlated with photoperiod (over 9-1 8 h) and senescence: CA,, was 3-fold and CA, was 10-to 11-fold higher in flowering SD C2 shoots, and the vegetative tissues within the SD apical bud contained 4-fold higher levels of CA,,, as compared with the LD tissues. Prefloral C2 plants under both photoperiods had CA, and CA,, levels similar to the flowering plants under LD. Levels of indole-3-acetic acid (IAA) were similar in C2 shoots in LD or SD; SD apical bud vegetative tissues had a slightly higher IAA content. Young floral buds from LD plants had twice as much IAA as under SD. In NCB1769 shoots CA, decreased after flower initiation only under LD, which correlated with the decreased growth potential. We suggest that the higher CA, content of G2 and NCB1769 plants under SD Under LD conditions fruit development in G2 pea plants results in apical senescence, but under SD conditions apical growth continues, despite the presence of a large number of fruit. This is dependent on the presence of dominant alleles at the Sn and Hr genetic loci. The photoperiodic response of G2 plants is nonphotosynthetic and quantitative, such that a brief exposure of light during the night does not reverse its SD growth habit (Proebsting et al., 1976). The growth rate of developing seeds on G2 plants is more rapid under LD than under SD conditions, which is indicative of a greater nutrient drain exerted on LD plants

show abstract

Genetic and Photoperiodic Control of the Relative Rates of Reproductive and Vegetative Development in Peas

Cited by 17 publications

References 8 publications

Gibberellin 3-oxidase Gene Expression Patterns Influence Gibberellin Biosynthesis, Growth, and Development in Pea

Gibberellin 3-oxidase Gene Expression Patterns Influence Gibberellin Biosynthesis, Growth, and Development in Pea

Maternal, Single-Gene Regulation of Assimilate Partitioning in Pea

The Control of Apical Bud Growth and Senescence by Auxin and Gibberellin in Genetic Lines of Peas

Contact Info

Product

Resources

About