The role of multiprotein bridging factor 1 (MBF1c) in Funariaceae species under salt stress v1

Abstract

Bryophytes are one of the most successful plants in nature and can tolerate several environmental stresses, such as saline stress. MBF1 is a transcription factor that may be involved in reprogramming transcription, which in turn may confer tolerance to stress conditions. The objective of this study was to quantify PaMBF1c under saline stress in three species of moss:Funaria hygrometrica,Physcomitrium acutifolium, andPhyscomitrella patens. All moss species underwent 12 h and 24 h treatment with salt at different concentrations, followed by qRT-PCR experiments. In F. hygrometrica, the MBF1c gene was up-regulated when subjected to 12 h salt treatment at a medium concentration, and may be an important factor for the tolerance of plants to NaCl concentrations. InP. acutifolium,24 h NaCl treatment at of 400, 600, and 800 mM resulted in a gradual up-regulation of MBF1c expression, reflective of the increasing NaCl concentration. InPhyscomitrella,the expression profile of MBF1c showed a down-regulation when treated with 200, 400, and 800 mM NaCl, suggesting that MBF1c may not interfere with the saline stress response in this plant. The diversity of these expression profiles demonstrate that the MBF1c response is not universal neither among plants nor between species of the same family, as shown in the mosses studied.

Enhanced pollen tube performance at high temperature contributes to thermotolerant fruit production in tomato

“…These DEGs, unlike the core pollen tube HT-responsive DEGs, were mainly decreased in response to HT. Among the small number of upregulated thermotolerant core DEGs was MBF1C, which has been identified as a HT response regulator that improves tolerance to stress and is independent of the heat shock factor (HSF) pathway [74][75][76][77][78][79][80] . These data illustrate that both thermosensitive and thermotolerant cultivars have transcriptional responses to elevated temperatures, ruling out the hypothesis that thermotolerant cultivars have higher optimal temperatures.…”