Novel insights into water-deficit-responsive mRNAs and lncRNAs during fiber development in Gossypium hirsutum

Abstract

Background The fiber yield and quality of cotton are greatly and periodically affected by water deficit. However, the molecular mechanism of the water deficit response in cotton fiber cells has not been fully elucidated. Results In this study, water deficit caused a significant reduction in fiber length, strength, and elongation rate but a dramatic increase in micronaire value. To explore genome-wide transcriptional changes, fibers from cotton plants subjected to water deficit (WD) and normal irrigation (NI) during fiber development were analyzed by transcriptome sequencing. Analysis showed that 3427 mRNAs and 1021 long noncoding RNAs (lncRNAs) from fibers were differentially expressed between WD and NI plants. The maximum number of differentially expressed genes (DEGs) and lncRNAs (DERs) was identified in fibers at the secondary cell wall biosynthesis stage, suggesting that this is a critical period in response to water deficit. Twelve genes in cotton fiber were differentially and persistently expressed at ≥ five time points, suggesting that these genes are involved in both fiber development and the water-deficit response and could potentially be used in breeding to improve cotton resistance to drought stress. A total of 540 DEGs were predicted to be potentially regulated by DERs by analysis of coexpression and genomic colocation, accounting for approximately 15.76% of all DEGs. Four DERs, potentially acting as target mimics for microRNAs (miRNAs), indirectly regulated their corresponding DEGs in response to water deficit. Conclusions This work provides a comprehensive transcriptome analysis of fiber cells and a set of protein-coding genes and lncRNAs implicated in the cotton response to water deficit, significantly affecting fiber quality during the fiber development stage.

Dual functionality of Trichoderma: Biocontrol of Sclerotinia sclerotiorum and biostimulant of cotton plants

“…Cotton (Gossypium hirsutum L.) is the most important source of natural fibers in the world (Sivakumar et al, 2021;Wu et al, 2022). According to Tarazi et al (2019), approximately 150 countries are directly involved in the cotton industrial chain, being an income source for more than 100 million families worldwide.…”

“…Thus, the succession of susceptible crops to S. sclerotiorum has been responsible for the continuous increase of the incidence of white mold, leading to an overuse of chemical fungicides as a means to alleviate crop yield losses. However, over-reliance of broad-spectrum chemical fungicides poses a serious risk to the environment (Koma ́rek et al, 2010), health of growers (Kniss, 2017), and accelerate the selection of resistant strains of S. sclerotiorum (Zhou et al, 2014), all of which require urgent alternative measures that include the development biorational solutions for the integrated management of white mold disease.…”