Early spring inhibition of ethylene synthesis increases fruit set and yield of ‘Rocha’ pear trees in Southern Brazil

Carra, Bruno; Pasa, M.S.; Silva, Carina P. da; Amarante, Cassandro Vidal Talamini do; Steffens, Cristiano André; Bartnicki, Vinícius Adão; Ciotta, Marlise Nara; Mello-Farias, Paulo; Einhorn, Todd C.

doi:10.1016/j.scienta.2017.12.062

Cited by 16 publications

(4 citation statements)

References 34 publications

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“…The absence of pollination and fertilization events stimulate ethylene biosynthesis gene expression leading to increased ethylene evolution in non-pollinated ovaries facilitating programmed senescence and abortion in pea Orzáez, Blay, & Granell, 1999;Savada et al, 2017) and several other plant species (Martínez et al, 2013;Shinozaki et al, 2015). Reduction in ovary ethylene production facilitates fruit set; this is consistent with the findings that the application of an ethylene action inhibitor, aminoethoxyvinylglycine, induced fruit set in pear (Pyrus communis L.; Carra et al, 2018) and silver thiosulfate (STS) delayed senescence of pollinated deseeded pericarp in pea (Johnstone, Reinecke, & Ozga, 2005). Environmental stresses such as high temperature during the flowering stage can decrease fruit set by stimulating ethylene-induced senescence in prepollinated ovaries (pea; Savada et al, 2017).…”

supporting

confidence: 81%

Balancing of hormonal biosynthesis and catabolism pathways, a strategy to ameliorate the negative effects of heat stress on reproductive growth

Kaur

Ozga

Reinecke

2020

Plant Cell & Environment

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In pea (Pisum sativum L.), moderate heat stress during early flowering/fruit set increased seed/ovule abortion, and concomitantly produced fruits with reduced ovary (pericarp) length, and fewer seeds at maturity. Plant hormonal networks coordinate seed and pericarp growth and development. To determine if these hormonal networks are modulated in response to heat stress, we analyzed the gene expression patterns and associated these patterns with precursors, and bioactive and inactive metabolites of the auxin, gibberellin (GA), abscisic acid (ABA), and ethylene biosynthesis/catabolism pathways in young developing seeds and pericarps of non-stressed and 4-day heat-stressed fruits. Our data suggest that within the developing seeds heat stress decreased bioactive GA levels reducing GA growth-related processes, and that increased ethylene levels may have promoted this inhibitory response. In contrast, heat stress increased auxin biosynthesis gene expression and auxin levels in the seeds and pericarps, and seed ABA levels, both effects can increase seed sink strength. We hypothesize that seeds with higher auxin-and ABA-induced sink strength and adequate bioactive GA levels will set and continue to grow, while the seeds with lower sink strength (low auxin, ABA, and GA levels) will become more sensitive to heat stress-induced ethylene leading to ovule/seed abortion.

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supporting

confidence: 81%

Balancing of hormonal biosynthesis and catabolism pathways, a strategy to ameliorate the negative effects of heat stress on reproductive growth

Kaur

Ozga

Reinecke

2020

Plant Cell & Environment

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“…The most signi cant direct positive effects on fruit yield was demonstrated by fruit weight (0.80); total sugars (0.61) and trunk girth (0.14) where fruit weight had a favourable indirect on trunk girth (0.04); total sugars (0.04); fruit length (0.02) and leaf blade length (0.01). These results concurred with those of Carra et al (2018) indicating direct effect of fruit weight on yield. Unaccounted-for effects in path coe cient analysis are classi ed as residual effects, and their low frequency at genotypic level suggested that the traits in the current study accounted for the majority of the variation in the dependent variable (fruit yield) (Chauhan et al 2020).…”

supporting

confidence: 90%

Genetic divergence studies among sand pear (Pyrus pyrifolia (Burm) Nakai.) genotypes for yield and yield contributing traits in North-Western Himalayas

Chauhan

Thakur

Dogra

et al. 2023

Preprint

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Germplasm assets are critical for hereditary breeding, investigation of complex traits and are conducive to the investigation and creation of unused germplasm. In order to effectively measure genetic divergence and character association for sand pear genetic improvement, yield and yield contributing variables were assessed for 125 genotypes during 2018–2021 in three districts of Himachal Pradesh, India (N-W Himalayas). The results indicated that estimates for eye basin, depth stalk cavity depth, fruit stalk length, non reducing sugars and leaf area high had high PCV and GCV values. High heritability and genetic gain both suggests the existence of additive gene action. The fruit's weight, sugar-to-acid ratio, and titratable acidity were reported, these qualities can be enhanced via direct selection. Fruit weight, total sugars, trunk diameter, total soluble solids (TSS), fruit length, fruit breadth, petiole length, and leaf area all have a high direct effect on plant yield, according to studies of association. Therefore, the overall result suggests that there is substantial diversity in the assessed attributes for them to serve as selection indices for genetic improvement of sand pear.

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“…The results Poor fruit set and low yield of LeConte cultivar are the major problem which facing pear growers at local or worldwide level (Carra et al, 2018). The data in Table 1 showed that gibberellic acid treatments enhanced vegetative characteristics of LeConte pear such as shoot length, pedicel length and pedicel diameter as compared with control and other individual treatments.…”

Section: Discussionmentioning

confidence: 95%

Enhancing fruit set, yield and quality of LeConte pear trees by preharvest foliar spray of some plant growth regulators

Attia

2022

SVU-International Journal of Agricultural Sciences

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The present study was conducted during the two seasons 2021 and 2022 on eight-years-old of LeConte pear cultivar for enhancing fruit set, yield and quality by preharvest foliar spray of some plant growth regulators. Preharvest treatments included: control (spray with water only), nitrophenolate sodium (NPS) at 200 ppm, GA4+7 at 10ppm, thidiazuron (TDZ) at 5ppm, NPS plus GA4+7, NPS plus TDZ and NPS plus GA4+7 and TDZ. All preharvest foliar treatments were sprayed at full bloom and after fruit set with ten days. The results showed that treatment with 200 ppm of nitrophenolate sodium increased fruit set, fruit firmness, TSS and carotenes. Increases in shoot length, fruit pedicel length and diameter, fruit set, yield, and acidity were seen after treatment with GA4+7 at 10 ppm. Carotenes and TSS in fruit were decreased. On the other hand, thidiazuron treatment at 5ppm increased pedicel fruit diameter, fruit set, yield, firmness, fruit diameter and acidity. Fruit TSS and carotenes were decreased.

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Early spring inhibition of ethylene synthesis increases fruit set and yield of ‘Rocha’ pear trees in Southern Brazil

Cited by 16 publications

References 34 publications

Balancing of hormonal biosynthesis and catabolism pathways, a strategy to ameliorate the negative effects of heat stress on reproductive growth

Balancing of hormonal biosynthesis and catabolism pathways, a strategy to ameliorate the negative effects of heat stress on reproductive growth

Genetic divergence studies among sand pear (Pyrus pyrifolia (Burm) Nakai.) genotypes for yield and yield contributing traits in North-Western Himalayas

Enhancing fruit set, yield and quality of LeConte pear trees by preharvest foliar spray of some plant growth regulators

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