Primigenic and positional dominance among reproductive buds in shoots of two apple (Malus × domestica (Borkh.)) cultivars in a warmer and cooler site

Maguylo, Karen; Cook, Nigel C.; Theron, Karen I.

doi:10.1007/s00468-013-0977-7

Cited by 2 publications

(2 citation statements)

References 36 publications

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“…Fruit position within the inflorescence greatly determines its survival, as clearly demonstrated in apple, where about 70% of the fruitlets abscise. Fruitlets at the apical (‘king’) position have ~70% likelihood of surviving and developing into mature fruit, while those in lateral positions within the cluster have 70% likelihood to abscise ( Maguylo et al , 2014 ; Jakopic et al , 2015 ). Moreover, mature fruit with immediate proximity to the king were smaller relative to both the king and those at lower positions, showing FFF is stronger with proximity to the king.…”

Section: Fruit Feedback On Fruit Growth and Retentionmentioning

confidence: 99%

Just enough fruit: understanding feedback mechanisms during sexual reproductive development

Sadka

Walker

Haim

et al. 2023

Journal of Experimental Botany

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The fruit and seed produced by a small number of crop plants provide the majority of food eaten across the world. Given the growing global population, there is a pressing need to increase yields of these crops without using more land or more chemical inputs. Many of these crops display prominent ‘fruit-flowering feedbacks’, in which fruit produced early in sexual reproductive development can inhibit the production of further fruit by a range of mechanisms. Understanding and over-coming these feedbacks thus presents a plausible route to increasing crop yields ‘for free’. In this review, we define three key types of fruit-flowering feedback, and examine how frequent they are, and their effects on reproduction in a wide range of both wild and cultivated species. We then assess how these phenomenologically distinct phenomena might arise from conserved phytohormonal signalling events, particularly the export of auxin from growing organs. Finally, we offer some thoughts on the evolutionary basis for these self-limiting sexual reproductive patterns, and whether they are also present in the cereal crops that fundamentally underpin global diets.

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Section: Fruit Feedback On Fruit Growth and Retentionmentioning

confidence: 99%

Just enough fruit: understanding feedback mechanisms during sexual reproductive development

Sadka

Walker

Haim

et al. 2023

Journal of Experimental Botany

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“…In areas with inadequate winter chilling, branches can respond to incomplete endodormancy by displaying symptoms of 'prolonged dormancy syndrome', which is characterized by erratic and prolonged budburst (Nava, Marodin, & Santos, 2009). When this occurs, acrotonic budburst tendencies are also reduced (Maguylo, Cook, & Theron, 2014). The lack of adaptation of peach tree cultivars to mild winter conditions can cause both blooming and flowering to be insufficient and sporadic, thus limiting subsequent fruit yields (Scariotto et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

<b>Adaptability and stability of reproductive and vegetative phases of peach trees in subtropical climate

et al. 2017

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ABSTRACT. The peach tree (Prunus persica) is a fruit species native to temperate climates that requires a chill during its hibernal period to overcome dormancy. However, due to genetic breeding, varieties are currently grown in subtropical and tropical regions where there are low occurrences of chill during this phenological stage. This study evaluated the adaptability and stability of the reproductive and vegetative phases of peach tree cultivars in a subtropical climate. An experiment was designed in randomized blocks with split time plots, with 23 peach tree cultivars and four replications, with each replication consisting of one plant and four shoots. The years of evaluated (plots) and the cultivars (subplots) were considered to be treatments. The relative rates of budburst (RRB), flowering (RRF), shoot formation (SF) and fruit set (FS), average time of budburst (ATB) and flowering (ATF), duration of budburst (DB) and flowering (DF) and number of hours with temperatures below 7.20°C were evaluated during the experimental period. The cultivars 'Bonão', 'Ouromel-4', 'Libra' and 'Maciel' demonstrated greater adaptability during the vegetative phase, whereas'Ouromel-4' and 'Libra' demonstrated greater adaptability and stability during the reproductive phase of peach trees in a subtropical climate.Keywords: Prunus persica, fruit set, shoot formation, chill requirement.Adaptabilidade e estabilidade de fases reprodutivas e vegetativas de pessegueiros em clima subtropical RESUMO. O pessegueiro (Prunus persica) é uma frutífera de clima temperado e necessita de frio durante o repouso hibernal para superar a dormência, entretanto, atualmente é cultivado em regiões subtropicais e tropicais, onde há menor ocorrência de frio durante essa fase fenológica. Este trabalho teve como objetivo avaliar a adaptabilidade e a estabilidade das fases vegetativa e reprodutiva de cultivares de pessegueiro em clima subtropical avaliando os estádios de brotação e floração. O delineamento utilizado foi em blocos casualizados com quatro repetições e quatro ramos por repetição, em esquema de parcelas subdivididas no tempo, no qual as parcelas representam o tempo (2 ciclos produtivos) e as subparcelas as cultivares (23). Foram avaliados a duração da brotação (DB) e floração (DF), o tempo médio de brotação (ATB) e floração (ATF), a quantidade de gemas vegetativas brotadas (RRB) e floríferas brotadas (RRF), a formação de ramos (SF) e frutificação efetiva (FS) e o número de horas com temperatura abaixo de 7,2ºC e 12ºC, e acima de 20ºC durante o período experimental. As cultivares 'Bonão', 'Ouromel-4', 'Libra' e 'Maciel' apresentam maior adaptabilidade e estabilidade da fase vegetativa e 'Ouromel-4' e 'Libra' apresentam maior adaptabilidade e estabilidade da fase reprodutiva de pessegueiro sob clima subtropical. Palavras-chave:Prunus persica, frutificação efetiva, formação de ramos, requerimento em frio.

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Primigenic and positional dominance among reproductive buds in shoots of two apple (Malus × domestica (Borkh.)) cultivars in a warmer and cooler site

Cited by 2 publications

References 36 publications

Just enough fruit: understanding feedback mechanisms during sexual reproductive development

Just enough fruit: understanding feedback mechanisms during sexual reproductive development

<b>Adaptability and stability of reproductive and vegetative phases of peach trees in subtropical climate

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