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Novel insights into biochemical and hormonal factors regulating floral transition in mango (Mangifera indica L.)

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Title Novel insights into biochemical and hormonal factors regulating floral transition in mango (Mangifera indica L.)
 
Creator Bajpai, Y
Trivedi, M
Muthukumar, M
Bajpai, A
 
Subject Mangifera indica
alternate bearing
floral transition
biochemical factors
hormonal factors
 
Description 54-64
Alternate or biennial bearing is an alternating pattern of large and small fruit yield occurring in consecutive years in
mango, which is a major issue related to erratic productivity. This bearing behaviour is known to be regulated by internal
physiological cues including biochemical and hormonal status of the adult shoots and accessibility to external stimulus that
influences floral transition. This study aims to compile evidences to establish biochemical and hormonal patterning in floral
transition utilizing standard protocols of colorimetric and transcriptomic studies. Floral tissues exhibited temporal pattern of
higher accumulation of chlorophyll (0.40 to 0.99 mg gm-1 tissue in Chausa), total sugar (8.83 to 26.65 mg gm-1 tissue in
Dashehari) and phenol content (0.21 to 0.83 mg gm-1 tissue in Dashehari), implying sufficient built-up of these in bud burst
stage to be associated with floral morphogenesis. Furthermore higher accumulation of anthocyanins and auxin content with
concomitant lower gibberellins in floral flush in all varieties validate the crosstalk among pathways to regulate the outcomes
of floral transition. The genes sucrose synthase, sucrose phosphate synthase 1 (log 2 fold change value upto 4.98), ATP
synthase, polyphenol oxidase and auxin response factor were found to be differentially expressed in the floral buds as
observed by transcriptome data which corroborate the leads obtained by biochemical and hormonal assays. The study gives
novel insights into the role of genes implicated in accumulation of carbohydrate reserves and establishment of hormonal
gradients, that have decisive role in the flowering processes in mango.
 
Date 2021-11-17T11:06:02Z
2021-11-17T11:06:02Z
2021-01
 
Type Article
 
Identifier 0975-0967 (Online); 0972-5849 (Print)
http://nopr.niscair.res.in/handle/123456789/58537
 
Language en
 
Publisher NIScPR-CSIR, India
 
Source IJBT Vol.20(1) [January 2021]