Physiological and molecular basis of alternate bearing in perennial fruit crops

Sharma, Nimisha; Singh, Sanjay K.; Mahato, Ajay Kumar; Ravishankar, H.; Dubey, Anil Kumar; Singh, Nagendra

doi:10.1016/j.scienta.2018.08.021

Cited by 44 publications

(39 citation statements)

References 158 publications

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“…have been carried out to explain the effects of CK-like compounds on plant growth and development. CK also mediates the responses to variable extrinsic factors, such as light conditions in the shoot and the availability of nutrients and water in the root, and it has a role in the response to biotic and abiotic stresses (Baktir et al, 2004;Cetinkaya, 2004;Davies, 2004;George et al, 2008;Al-Shdiefat and Qrunfleh, 2008;Okay et al, 2011;Sharma et al, 2019). The present study has given a fair insight into the status of CK-like compounds during bud abscission in P. vera L..…”

Section: Discussionmentioning

confidence: 99%

“…PGRs are active at micromolar or lower concentrations in the growth and development of plants. PGRs are classified into five 'classic' groups -abscisic acid, auxins, cytokinins (CKs), ethylene and gibberellins (Davies, 2004;George et al, 2008;Bons et al, 2015;Sharma et al, 2019). Among these groups, CKs, N 6 -substituted purine derivatives, are a significant class of PGRs that regulate a large number of physiological and developmental processes in plants.…”

Section: Introductionmentioning

confidence: 99%

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Identification of the profile of endogenous cytokinin-like compounds during different plant growth stages and their effects on flower bud abscission in pistachio (Pistacia vera L.)

Gündeşli¹,

Kafkas

Güney

et al. 2020

Folia Horticulturae

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Alternate bearing is a significant economic problem that affects fruit producers, consumers and the economy of a country. Concentrations of cytokinin (CK)-like compounds in different tissues of pistachio trees (Pistacia vera ‘Uzun’) were measured to elucidate the relationship between endogenous CKs and flower bud abscission (alternate bearing). Identification and quantification of CK-like compounds of the Z, DHZ and iP types from different physiological stages and tissues were performed using high-performance liquid chromatography–electrospray ionisation–tandem mass spectrometry (HPLCESI-MS/MS) techniques. Five to seven different CK-like compounds were detected, respectively. Isopentenyl adenine riboside (iPR) and trans-zeatin-O-glucoside (t-ZOG) were the main isoprenoid CKs, as the dominant conjugates in all the analysed organs of pistachio trees. The leaves and shoots of ‘On’-year trees had significantly higher CK contents than those of ‘Off’-year trees on all the sampling dates. Interestingly, the relatively high CK activity was recorded before flower bud abscission in the fractions corresponding to iPR and t-ZOG, while this activity dropped considerably during the flower bud abscission period (55 DAFB). Consequently, the strong negative correlation between CK concentration and bud abscission could be the first indication of the role of CK-like compounds in this unique phenomenon in the ‘Uzun’ pistachio cultivar. It was concluded that CKs could have an important role in the alternate bearing in pistachio.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Identification of the profile of endogenous cytokinin-like compounds during different plant growth stages and their effects on flower bud abscission in pistachio (Pistacia vera L.)

Gündeşli¹,

Kafkas

Güney

et al. 2020

Folia Horticulturae

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“…The greater the number of DEGS in a particular type or metabolic pathway, the greater the redundancy of genes, involved in that type of life activity, the richer the metabolic pathways that may occur, resulting in a greater variety of physiological phenomena. A high number of DEGs in metabolic pathways makes it more likely for those genes to regulate life activities and have a greater impact on the phenotypic traits of species [25][26][27][28]. The analysis of the main enrichment pathways among the 633 core genes could help better understand the molecular basis of bamboo culm wall-thickening.…”

Section: Analysis Of Critical Pathwaysmentioning

confidence: 99%

Gene Set Subtraction Reveals 633 Candidate Genes for Bamboo Culm Wall Thickening

Zhou

et al. 2020

Forests

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Abundant research has been conducted on the physiological, biochemical, and anatomical aspects of bamboo culm wall thickening, but its molecular mechanism has not yet been investigated. In this study, we performed whole-genome resequencing of Phyllostachys edulis ‘Pachyloen’, Phyllostachys nidularia f. farcta, Phyllostachys heteroclada f. solida with significantly thicker culm walls, and Schizostachyum dumetorum var. xinwuense with extremely thin culm walls. Moreover, we pioneered the innovative use of gene set subtraction to explore candidate genes that regulate bamboo culm wall thickening. A candidate gene set, containing 633 genes, was obtained by eliminating shared genes that help maintain physiological processes after alignment with the P. edulis reference genome. Starch and sucrose, oxidative phosphorylation, and ribosome were the three most important pathways enriched by differentially expressed genes. Although it cannot be used for hyperfine localization of bamboo wall thickness-regulatory genes, gene set reduction narrows down the range of candidate genes at minimal cost and provides new clues for the application of bioinformatics in plant research.

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“…This aspect is of particular interest for many crops, including all Citrus species, which are routinely grafted since the choice of the rootstock can greatly influence traits of economic interest such as plant architecture, yield, fruit quality and tolerance to biotic and abiotic stress [34]. It has already been demonstrated in other perennial fruit tree crops (apple, mango and avocado) that flowering can be influenced by different factors including rootstock [35,36]. Similar studies were conducted in sweet cherry and pear, in which it was observed that rootstock affects the scion precocity, the abundance of flowering and the attitude of flowers to set fruit [37].…”

Section: Introductionmentioning

confidence: 99%

Rootstock Affects Floral Induction in Citrus Engaging the Expression of the FLOWERING LOCUS T (CiFT)

et al. 2021

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In Citrus, flower induction represents the transition from vegetative to reproductive growth. The regulation of flower induction is mainly triggered by exposure to low temperatures and water-deficit stress, which activates the signaling cascade leading to an increased expression of the citrus orthologs of the FLOWERING LOCUS T (CiFT). In this study, the relationship between rootstock and flower induction under Mediterranean field conditions was investigated by monitoring the expression levels of the floral promoter CiFT2 in leaves of the pigmented sweet orange “Tarocco Scirè” grafted onto “C35” citrange and “Swingle” citrumelo rootstocks. The latter two are known to confer, respectively, high and low yield efficiency to the scion. In both rootstock/scion combinations, CiFT2 showed a seasonal expression with a peak during the inductive period in January triggered by cold temperature. The “Tarocco Scirè”/”C35” citrange combination showed the highest expression levels for CiFT2; this increased expression was correlated with yield and a higher number of flowers in the following spring, suggesting a significant effect of rootstocks on flower induction mediated by the overexpression of the CiFT2 gene.

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Physiological and molecular basis of alternate bearing in perennial fruit crops

Cited by 44 publications

References 158 publications

Identification of the profile of endogenous cytokinin-like compounds during different plant growth stages and their effects on flower bud abscission in pistachio (Pistacia vera L.)

Identification of the profile of endogenous cytokinin-like compounds during different plant growth stages and their effects on flower bud abscission in pistachio (Pistacia vera L.)

Gene Set Subtraction Reveals 633 Candidate Genes for Bamboo Culm Wall Thickening

Rootstock Affects Floral Induction in Citrus Engaging the Expression of the FLOWERING LOCUS T (CiFT)

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