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Gene 2015-Dec

First proteome study of sporadic flowering in bamboo species (Bambusa vulgaris and Dendrocalamus manipureanus) reveal the boom is associated with stress and mobile genetic elements.

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Bengyella Louis
Sayanika Devi Waikhom
Sailendra Goyari
Robinson C Jose
Pranab Roy
Narayan Chandra Talukdar

Keywords

Abstract

Bamboo species are the fastest-growing plants having a long vegetative cycle. Abrupt switching from the vegetative phase to the reproductive phase via sporadic flowering boom, occasionally leads to death of bamboo clumps, and threatens the existence of many bamboo species. To apprehend the molecular mechanism driving sporadic flowering, proteome changes in the initial and advanced floral buds of two edible bamboo species (Bambusa vulgaris and Dendrocalamus manipureanus) was dissected by two-dimensional gel electrophoresis (2-DE). A total of 39 differentially expressed peptide spots were identified by matrix-assisted laser desorption ionization time-of-flight/time-of-flight mass spectrometry (MALDI-TOF-TOF/MS). In both B. vulgaris and D. manipureanus, identified proteins were categorized as transposon-related, defence and stress-related, cell cycle related, metabolism related, signal transduction related, and some lacked known putative domains. Proteins such as SEPALLATA3, ubiquitin, histone 3, thaumatin-like protein, putative tethering factor, SF-assemblin, polyubiquitin, mitochondrial carrier-like protein and RPT2-like protein were significantly expressed. Differences in D. manipureanus and B. vulgaris suggested that bamboo species have diverse 'drivers' or 'passengers' genes that govern natural sporadic flowering boom. This first floral proteomics analysis of bamboos revealed that sporadic boom is a highly energetic process, associated with stress elements, mobile genetic elements and signal transduction cross-talk elements.

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