Imperative role of sugar signaling and transport during drought stress responses in plants

Abstract

Cellular sugar status is essentially maintained during normal growth conditions but is impacted negatively during various environmental perturbations. Drought presents one such unfavorable environmental cue that hampers the photosynthetic fixation of carbon into sugars and affects their transport by lowering the cellular osmotic potential. The transport of cellular sugar is facilitated by a specific set of proteins known as sugar transporters. These transporter proteins are the key determinant of influx/ efflux of various sugars and their metabolite intermediates that support the plant growth and developmental process. Abiotic stress and especially drought stress‐mediated injury results in reprogramming of sugar distribution across the cellular and subcellular compartments. Here, we have reviewed the imperative role of sugar accumulation, signaling, and transport under typical and atypical stressful environments. We have discussed the physiological effects of drought on sugar accumulation and transport through different transporter proteins involved in monosaccharide and disaccharide sugar transport. Further, we have illustrated sugar‐mediated signaling and regulation of sugar transporter proteins along with the overall crosstalk of this signaling with the phytohormone module of abiotic stress response under osmotic stress. Overall, the present review highlights the critical role of sugar transport, distribution and signaling in plants under drought stress conditions.

Antimicrobial Potential of Essential Oils from Aromatic Plant Ocimum sp.; A Comparative Biochemical Profiling and In-Silico Analysis

“…Plants exposure to (a)biotic stress, including extreme temperatures, drought, flooding, bacterial and fungal infection, etc., disturbs cellular functionality that limits their growth and development and eventually reduces the crop yield and quality. These stressors disturb the cellular and metabolic processes by altering the phytohormone signalling, transcriptional regulation, and signalling cascade, which eventually results in compromised growth and productivity of plants [17][18][19][20][21]. The impact of biotic stress has resulted in a huge loss to the global economy and intensifies the issues of hunger and food insecurity.…”

Role of sugar and auxin crosstalk in plant growth and development

“…The crosstalk between sugars and auxin are modulated to fine‐tune the key biological processes throughout plant development. In past years, due to the availability of transcriptomic data of model species as well as crop plant species, people have begun to shed light onto the complex pathways of sugar sensing, signaling, and its interactions with multiple hormones as well as environmental signals (Fu et al 2020; Gupta et al 2015a; Kaur et al 2021a; Mishra et al 2009; Sakr et al 2018; Sami et al 2019). However, so far, there has been no review that summarizes the complex crosstalk of sugar and auxin signaling in orchestrating the fine balance of the two signaling pathways in regulating plant growth.…”

Sugar transporters and their molecular tradeoffs during abiotic stress responses in plants

“…In general, high endogenous sugar, resulting from higher sugar accumulation under unstressed conditions, promotes TOR kinase activity in plants (Kaur et al, 2021; Ren et al, 2012; Robaglia et al, 2012). The activated TOR further phosphorylates the ABA receptors (PYLs), resulting in their inactivation).…”