Effect of exogenous application of free polyamines on physiological disorders and yield of ‘Kaleh-Ghoochi’ pistachio shoots (Pistacia vera L.)

Khezri, Masood; Talaie, Alireza; Javanshah, Amanallah; Hadavi, Faranak

doi:10.1016/j.scienta.2010.03.014

Cited by 25 publications

(8 citation statements)

References 37 publications

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“…These references, along with our results, support the fact that polyamines could play a crucial role in the inflorescence bud abscission of pistachio. A high level of polyamines is known to act as antisenescence agents and counteract the activity of abscisic acid and ethylene [57]. The competition between polyamines and ethylene pathways for S-adenosil methionine (AdoMet) or the inhibition of ACC syntase or ethylene forming enzyme (EFE) by polyamines can result in a mechanism that can modulate physiological events, including senescence and flower bud abscission.…”

Section: Discussionmentioning

confidence: 99%

“…Therefore, during June "OFF" inflorescence buds, no PCD and autophagy occur ( Figure 6) and makes plant stable for the next upcoming "ON" season ( Figure 7). Interestingly it seems that in pistachio exogenous application of PA can reduce many physiological disorders and inflorescence bud abscission [57,79], and preliminary experiments are currently being carried out in the cultivar Bianca to detect the dose and the timing of treatment. This work concludes that, in the "OFF" inflorescence buds of June, the genes corresponding to carbohydrate show reduction compared to June "ON" inflorescence bud.…”

Section: Discussionmentioning

confidence: 99%

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Transcriptome Analysis of Pistacia vera Inflorescence Buds in Bearing and Non-Bearing Shoots Reveals the Molecular Mechanism Causing Premature Flower Bud Abscission

Benny

Marra

Giovino

et al. 2020

Genes

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The alteration of heavy (“ON/bearing”) and light (“OFF/non-bearing”) yield in pistachio (Pistacia vera L.) has been reported to result from the abscission of inflorescence buds on high yielding trees during the summer, but the regulatory mechanisms involved in this bud abscission remain unclear. The analysis provides insights into the transcript changes between inflorescence buds on bearing and non-bearing shoots, that we indicated as “ON” and “OFF”, and shed light on the molecular mechanisms causing premature inflorescence bud abscission in the pistachio cultivar “Bianca” which can be related to the alternate bearing behavior. In this study, a transcriptome analysis was performed in inflorescence buds of “ON” and “OFF” shoots. A total of 14,330 differentially expressed genes (DEGs), most of which are involved in sugar metabolism, plant hormone pathways, secondary metabolism and oxidative stress pathway, were identified. Our results shed light on the molecular mechanisms underlying inflorescence bud abscission in pistachio and we proposed a hypothetical model behind the molecular mechanism causing this abscission in “ON” shoots. Results highlighted how changes in genes expressed in nutrient pathways (carbohydrates and mineral elements) in pistachio “ON” vs. “OFF” inflorescence buds triggers a cascade of events involving trehalose-6-phosphate and target of rapamycin (TOR) signaling, SnRK1 complex, hormones, polyamines and ROS which end, through programmed cell death and autophagy phenomena, with the abscission of inflorescence buds. This is the first study reporting gene expression profiling of the fate of “ON” and “OFF” inflorescence buds associated with the alternate bearing in the pistachio.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Transcriptome Analysis of Pistacia vera Inflorescence Buds in Bearing and Non-Bearing Shoots Reveals the Molecular Mechanism Causing Premature Flower Bud Abscission

Benny

Marra

Giovino

et al. 2020

Genes

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show abstract

“…The link between polyamines and fruit abscission has been scrutinized particularly closely. Their effects vary according to the polyamine type, concentration, and time of application (Aziz, 2003;Singh, 2003, 2006;Khezri et al, 2010). For instance, in mango, spermine is probably the most critical polyamine for abscission , while in grapevine inflorescences, an increased percentage of abscission has been correlated with free polyamine levels, mainly spermidine (Aziz et al, 2001;Aziz, 2003).…”

Section: Polyaminesmentioning

confidence: 99%

Cross-talk between environmental stresses and plant metabolism during reproductive organ abscission

Sawicki

Barka

Clément

et al. 2015

Journal of Experimental Botany

128

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In plants, flowering is a crucial process for reproductive success and continuity of the species through time. Fruit production requires the perfect development of reproductive structures. Abscission, a natural process, can occur to facilitate shedding of no longer needed, infected, or damaged organs. If stress occurs during flower development, abscission can intervene at flower level, leading to reduced yield. Flower abscission is a highly regulated developmental process simultaneously influenced and activated in response to exogenous (changing environmental conditions, interactions with microorganisms) and endogenous (physiological modifications) stimuli. During climate change, plant communities will be more susceptible to environmental stresses, leading to increased flower and fruit abscission, and consequently a decrease in fruit yield. Understanding the impacts of stress on the reproductive phase is therefore critical for managing future agricultural productivity. Here, current knowledge on flower/fruit abscission is summarized by focusing specifically on effects of environmental stresses leading to this process in woody plants. Many of these stresses impair hormonal balance and/or carbohydrate metabolism, but the exact mechanisms are far from completely known. Hormones are the abscission effectors and the auxin/ethylene balance is of particular importance. The carbohydrate pathway is the result of complex regulatory processes involving the balance between photosynthesis and mobilization of reserves. Hormones and carbohydrates together participate in complex signal transduction systems, especially in response to stress. The available data are discussed in relation to reproductive organ development and the process of abscission.

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“…Furthermore, sink competition due to lack of nutrients can induce oxidative stress and ROS accumulation leading to autophagy in inflorescence buds [ 11 ]. Nevertheless, a negative correlation between polyamines and bud abscission has been found in pistachio trees [ 8 , 10 , 11 , 59 ] Thus, the competition between polyamines and ethylene pathways for S -adenosyl methionine can result in a mechanism that can modulate physiological events, including senescence and inflorescence bud abscission.…”

Section: Discussionmentioning

confidence: 99%

Transcriptomic Analysis of the Pistacia vera (L.) Fruits Enable the Identification of Genes and Hormone-Related Gene Linked to Inflorescence Bud Abscission

Benny

Giovino

Marra

et al. 2021

Genes

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Pistacia vera (L.) is an alternate bearing species. The tree produces axillary inflorescence buds every year. Still, they abscise in “ON” overloaded shoots, causing a limited production in the following “OFF” year, causing a significant and unfavorable production fluctuation. In this work, we carried out de novo discovery and transcriptomic analysis in fruits of “ON” and “OFF” shoots of the cultivar Bianca. We also investigated whether the fruit signaling pathway and hormone biosynthesis directly or indirectly linked to the premature fall of the inflorescence buds causing alternate bearing. We identified 1536 differentially expressed genes (DEGs) in fruits of “ON” vs. “OFF” shoots, which are involved primarily in sugar metabolism, plant hormone pathways and transcription factors. The premature bud abscission linked to the phenomenon is attributable to a lack of nutrients (primarily sugar) and the possible competition between the same branches’ sinks (fruits vs. inflorescence buds). Hormone pathways are involved as a response to signals degradation and remobilization of carbon and nutrients due to the strengthening of the developing embryos. Genes of the secondary metabolism and transcription factors are also involved in tailoring the individual branches response to the nutritional stress and sink competition. Crosstalk among sugar and various hormone-related genes, e.g., ethylene, auxin, ABA and cytokinin, were determined. The discovery of putative biomarkers like callose synthase 5, trehalose-6-phosphate synthase, NAD(P)-linked oxidoreductase and MIOX2, Jasmonate, and salicylic acid-related genes can help to design precision farming practices to mitigate the alternate bearing phenomenon to increase farming profitability. The aim of the analysis is to provide insight into the gene expression profiling of the fate of “ON” and “OFF” fruits associated with the alternate bearing in the pistachio.

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Effect of exogenous application of free polyamines on physiological disorders and yield of ‘Kaleh-Ghoochi’ pistachio shoots (Pistacia vera L.)

Cited by 25 publications

References 37 publications

Transcriptome Analysis of Pistacia vera Inflorescence Buds in Bearing and Non-Bearing Shoots Reveals the Molecular Mechanism Causing Premature Flower Bud Abscission

Transcriptome Analysis of Pistacia vera Inflorescence Buds in Bearing and Non-Bearing Shoots Reveals the Molecular Mechanism Causing Premature Flower Bud Abscission

Cross-talk between environmental stresses and plant metabolism during reproductive organ abscission

Transcriptomic Analysis of the Pistacia vera (L.) Fruits Enable the Identification of Genes and Hormone-Related Gene Linked to Inflorescence Bud Abscission

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