Warm winter temperature induced changes in the dormant buds of ‘Dangshansuli’ pear (<i>Pyrus bretschneideri</i> Rehd.)

Yi, Xianfeng; Xu, Yongsheng; Gao, Zhiming; Zhang, J.Y.; Pan, Hongmei; Qi, Ying; Qin, Guojie; Li, Bo

doi:10.5958/0974-0112.2020.00037.7

Cited by 3 publications

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“…For temperate fruit and nut trees, adequate winter chill and heat accumulation are critical requirements for satisfactory commercial production ( Gordo and Sanz, 2009 ; Cerutti et al., 2011 ; Luedeling et al., 2013 ; Darbyshire et al., 2016 ; Horikoshi et al., 2018 ; Fadon et al., 2020 ; Fernandez et al., 2020a ; del Barrio et al., 2022 ). Insufficient winter chill and increasing heat during key phenological stages can affect important physiological processes, leading to non-uniform flowering ( El Yaacoubi et al., 2014 ; Orlandi et al., 2014 ; Legave et al., 2015 ; Funes et al., 2016 ; Elloumi et al., 2024 ), delayed bud formation ( Bonhomme et al., 2005 ; El Yaacoubi et al., 2016 ; Yi et al., 2020 ; Barba-Espin et al., 2022 ), abnormal bud-break ( Bonhomme et al., 2005 ), fruit set reduction ( Hedhly et al., 2007 ; Ruiz and Egea, 2008 ; Benlloch-Gonzalez et al., 2018 ; Egea et al., 2022 ), and ultimately reduced yield potential ( Benmoussa et al., 2018 ; Moriondo et al., 2019 ; Mujahid et al., 2020 ; Fernandez et al., 2021 ). The literature reports a consistent decline in winter chill in all warm temperate climate regions around the world, which explains the high research interest in this topic.…”

Section: Discussionmentioning

confidence: 99%

Climate change impacts on temperate fruit and nut production: a systematic review

Osorio-Marín,

Fernandez,

Vieli

et al. 2024

Front. Plant Sci.

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Temperate fruit and nut crops require distinctive cold and warm seasons to meet their physiological requirements and progress through their phenological stages. Consequently, they have been traditionally cultivated in warm temperate climate regions characterized by dry-summer and wet-winter seasons. However, fruit and nut production in these areas faces new challenging conditions due to increasingly severe and erratic weather patterns caused by climate change. This review represents an effort towards identifying the current state of knowledge, key challenges, and gaps that emerge from studies of climate change effects on fruit and nut crops produced in warm temperate climates. Following the PRISMA methodology for systematic reviews, we analyzed 403 articles published between 2000 and 2023 that met the defined eligibility criteria. A 44-fold increase in the number of publications during the last two decades reflects a growing interest in research related to both a better understanding of the effects of climate anomalies on temperate fruit and nut production and the need to find strategies that allow this industry to adapt to current and future weather conditions while reducing its environmental impacts. In an extended analysis beyond the scope of the systematic review methodology, we classified the literature into six main areas of research, including responses to environmental conditions, water management, sustainable agriculture, breeding and genetics, prediction models, and production systems. Given the rapid expansion of climate change-related literature, our analysis provides valuable information for researchers, as it can help them identify aspects that are well understood, topics that remain unexplored, and urgent questions that need to be addressed in the future.

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Section: Discussionmentioning

confidence: 99%

Climate change impacts on temperate fruit and nut production: a systematic review

Osorio-Marín,

Fernandez,

Vieli

et al. 2024

Front. Plant Sci.

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“…Respiratory metabolism is the foundation of plant life activities [35]. Although the meristem tissue temporarily stops growing after pear flower buds enter dormancy, life activities still continue [36]. There is an inevitable connection between respiratory metabolism and the dormancy of pear flower buds.…”

Section: Discussionmentioning

confidence: 99%

Comparative Analysis of Transcriptomes to Identify Genes during Bud Dormancy of Pyrus pyrifolia ‘Huanghua’

Wang,

Liu,

et al. 2024

Horticulturae

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The study of pear dormancy mechanisms is currently a major research area in pear production and has high economic significance for agricultural production. We selected the southern sand pear cultivar Pyrus pyrifolia ‘Huanghua’ as the test material to study the pear dormancy process through microscopic observation of pear flower buds. The endodormancy period is abbreviated as D_bud. Similarly, the endodormancy release initiation period and the ecodormancy period are referred to as DB_bud and G_bud, respectively. Meanwhile, RNA sequencing was used to obtain the gene expression profile of Pyrus pyrifolia ‘Huanghua’ flower buds. The RNA sequencing results indicated that there were 224 differentially expressed genes (DEGs) in endodormancy (D) vs. endodormancy release initiation period (DB), while 975 were identified between endodormancy and ecodormancy (G). Finally, a total of 868 DEGs were found in the DB vs. G comparison. The expression levels of the genes Pbr009498.1 (LAX1-1), Pbr012348.1 (LAX1-2), Pbr021158.1 (GH35), and Pbr031621.1 (LAX2) encoding IAA were significantly higher during the DB_bud than during the D_bud. The expression level of Pbr025864.2 (IAA13) during the D_bud was significantly higher than the DB_bud and G_bud. The Pbr041942.1 (GID1B) gene also showed a significant increase during ecodormancy. Taken together, these results suggest that these genes, annotated as LAX1, GH35, LAX2, IAA13, and GID1C, are involved in endodormancy maintenance and in the transition from endodormancy to ecodormancy in Pyrus pyrifolia ‘Huanghua’.

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Hormonal profiles in dormant turions of 22 aquatic plant species: do they reflect functional or taxonomic traits?

Adamec,

Plačková,

Bitomský

et al. 2024

Annals of Botany

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Background and Aims Turions are vegetative, dormant overwintering organs formed in aquatic plants in response to unfavourable ecological conditions. Contents of cytokinin (CK) and auxin metabolites and ABA as main growth and development regulators were compared in innately dormant autumnal turions of 22 aquatic plant species of different functional ecological or taxonomic groups with those in non-dormant winter apices in three aquatic species and with those in spring turions of four species after their overwintering. Methods The hormones were analysed in miniature turion samples using ultraperformance liquid chromatography coupled with triple quadrupole mass spectrometry. Key Results In innately dormant turions, the total contents of each of the four main CK types, biologically active forms and total CKs differed by two–three orders of magnitude across 22 species; the proportion of the active CK forms was 0.18–67 %. Similarly, the content of four auxin forms was extremely variable and the IAA proportion as the active form was 0.014–99 %. The ABA content varied from almost zero to 54 µmol kg-1 dry weight and after overwintering, it usually significantly decreased. Hormone profiles depended most of all functional traits studied on the place of turion sprouting (surface vs. bottom) and suggest that this trait is crucial for turion ecophysiology. Conclusions The key role of ABA in regulating turion dormancy was confirmed. However, the highly variable pattern of the ABA content in innately dormant and in overwintered turions indicate that the hormonal mechanism regulating the innate dormancy and its breaking in turions are not united within aquatic plants.

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Warm winter temperature induced changes in the dormant buds of ‘Dangshansuli’ pear (Pyrus bretschneideri Rehd.)

Cited by 3 publications

References 0 publications

Climate change impacts on temperate fruit and nut production: a systematic review

Climate change impacts on temperate fruit and nut production: a systematic review

Comparative Analysis of Transcriptomes to Identify Genes during Bud Dormancy of Pyrus pyrifolia ‘Huanghua’

Hormonal profiles in dormant turions of 22 aquatic plant species: do they reflect functional or taxonomic traits?

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