Physiological, Biochemical, and Transcriptomic Responses to Boron Toxicity in Leaf and Root Tissues of Contrasting Wheat Cultivars

Boron toxicity in higher plants: an update

“…In some cases, B excess also results in alterations of photosynthetic pigment content and its relative proportion, e.g. chlorophyll a, b content and a/b ratio (Huang et al 2014;Kayıhan et al 2017) and carotenoid (Sarafi et al 2018). All these effects are not related to a particular target of B toxicity at cellular level but are rather the observed responses of the ability of B to form complexes to molecules which are involved in different cellular processes.…”

“…An imbalance of C/N ratio also promote phenomena of early senescence (Lo Piccolo et al 2018;Sotiras et al 2019) and this explains the enhancement of senescence-related hormones i.e. jasmonic acid and ethylene promoted by B excess in barley and wheat (Öz et al 2009;Kayıhan et al 2017).…”

Moderate level of toxic boron causes differential regulation of microRNAs related to jasmonate and ethylene metabolisms in Arabidopsis thaliana

“…Therefore, further investigations are required to understand the differential regulation of miR397 in plants. B toxicity was previously found to induce JA-and ethylene-related genes (Öz et al, 2009;Kayıhan et al, 2017). Thus, the expression levels of miR159, miR172, miR319, and miR394 were assessed in Arabidopsis thaliana in order to understand posttranscriptional regulation of JA-and ethylene-related transcription factors under high B conditions.…”

“…Also, many genes associated with cell wall modification were significantly regulated in wheat under B toxicity conditions (Kayıhan et al, 2017). Interestingly, the genes related to JA, ethylene, and cell wall modification were significantly regulated in only a sensitive wheat cultivar when compared to a tolerant wheat cultivar (Kayıhan et al, 2017). These genes might participate in the B toxicity response in plants.…”

“…It was also found that B toxicity induced jasmonate (JA)and ethylene-related genes in wheat (Kayıhan et al, 2017) and barley (Öz et al, 2009). Also, many genes associated with cell wall modification were significantly regulated in wheat under B toxicity conditions (Kayıhan et al, 2017). Interestingly, the genes related to JA, ethylene, and cell wall modification were significantly regulated in only a sensitive wheat cultivar when compared to a tolerant wheat cultivar (Kayıhan et al, 2017).…”