Influence of Par Flux and Temperature on the Flower Bud Abortion of Rose (Rosa Hybrida Cv. Frisco) and the Carbon Balance of the Shoot

Pien, Helga; Lemeur, Raoul; Labeke, Marie-Christine Van

doi:10.17660/actahortic.2000.515.14

Cited by 5 publications

(3 citation statements)

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“…Adverse environmental changes that limit photosynthesis and alter carbohydrate levels often lead to aborted flower buds, i.e., leaf shading by other leaves and rainy weather ( Figure 1 B), which led to a flower bud abortion rate over 80% in the variety used in this study. Flower bud abortion also exists in other plants, such as the tree peony [ 12 ] and rose [ 13 ]. In roses, abortion in winter is attributed to a disequilibrium between carbohydrate production and demand [ 13 ].…”

Section: Resultsmentioning

confidence: 99%

“…Flower bud abortion also exists in other plants, such as the tree peony [ 12 ] and rose [ 13 ]. In roses, abortion in winter is attributed to a disequilibrium between carbohydrate production and demand [ 13 ]. To maximize reproductive success, plants tend to keep the flowering process in coincidence with the most favorable environmental conditions.…”

Section: Resultsmentioning

confidence: 99%

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Regulation of Flowering Timing by ABA-NnSnRK1 Signaling Pathway in Lotus

Cao

Jin

Kuang

et al. 2021

IJMS

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The lotus produces flower buds at each node, yet most of them are aborted because of unfavorable environmental changes and the mechanism remains unclear. In this work, we proposed a potential novel pathway for ABA-mediated flower timing control in the lotus, which was explored by combining molecular, genetic, transcriptomic, biochemical, and pharmacologic approaches. We found that the aborting flower buds experienced extensive programmed cell death (PCD). The hormonal changes between the normal and aborting flower buds were dominated by abscisic acid (ABA). Seedlings treated with increasing concentrations of ABA exhibited a differential alleviating effect on flower bud abortion, with a maximal response at 80 μM. Transcriptome analysis further confirmed the changes of ABA content and the occurrence of PCD, and indicated the importance of PCD-related SNF1-related protein kinase 1 (NnSnRK1). The NnSnRK1-silenced lotus seedlings showed stronger flowering ability, with their flower:leaf ratio increased by 40%. When seedlings were treated with ABA, the expression level and protein kinase activity of NnSnRK1 significantly decreased. The phenotype of NnSnRK1-silenced seedlings could also be enhanced by ABA treatment and reversed by tungstate treatment. These results suggested that the decline of ABA content in lotus flower buds released its repression of NnSnRK1, which then initiated flower bud abortion.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Regulation of Flowering Timing by ABA-NnSnRK1 Signaling Pathway in Lotus

Cao

Jin

Kuang

et al. 2021

IJMS

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“…Stressful environments such as high temperatures and light limitation during bud development can lead to ¯ower bud abortion (Shigeoka and Ohkouchi, 1993). Other studies have shown that the type of resource limitation determines the degree of ¯ower bud abortion (Moe, 1971;de Vries et al, 1981;Pien and Lemeur, 2000).…”

Section: Introductionmentioning

confidence: 99%

Flower Bud Abortion Influences Clonal Growth and Sexual Dimorphism in the Understorey Dioecious Shrub Aucuba japonica (Cornaceae)

Abe

2002

Annals of Botany

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Sexual differences were investigated to determine the significance of flower bud abortion in the dioecious shrub Aucuba japonica Thunb. The mean number of flowers per inflorescence and the mean number of flowering inflorescences (as opposed to aborted inflorescences) per individual were greater in males than in females in 1997 and 1998. Reproductive investment by males was 0.4-times (1997) and 1.4-times (1998) that by females. In addition, females aborted 30.9% (1997) and 42.7% (1998) of their total flower buds without blooming, whereas no male flower buds aborted. One of the architectural traits of this shrub is that in the year that a flower bud is produced at the shoot apex, the shoot will branch into two or more shoots. Thus, there was less sexual difference in the number of current shoots per individual than there was in the number of flowering inflorescences. The relationship between annual growth and reproduction, and the probability of reproduction in the following year, suggested that the higher investment in female reproduction was manifested as a cost for reproductive frequency rather than as a cost for annual growth. The spatial distribution of both males and females was clumped, which may be the result of clonal growth. In addition, overall sex ratios were not skewed and the number of sprouts did not differ significantly between sexes. These results suggested that flower bud abortion by females might reduce sexual dimorphism in terms of clonal growth.

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