Rezayian Maryam, Niknam Vahid, Ebrahimzadeh Hassan
Department of Plant Biology, and Center of Excellence in Phylogeny of Living Organisms in Iran, School of Biology, College of Science, University of Tehran, Tehran, 14155 Iran.
Physiol Mol Biol Plants. 2019 Mar;25(2):497-509. doi: 10.1007/s12298-018-00634-4. Epub 2019 Feb 15.
The effects of penconazole (PEN) and calcium (Ca) on physiological and biochemical parameters were investigated in two canola cultivars (RGS003 and Sarigol) under water stress. Drought increased protein content in RGS003, but PEN, Ca and PEN-Ca treatment induced protein content in Sarigol. PEN, Ca and PEN-Ca treatment enhanced soluble sugar content in RGS003. In contrast to Sarigol, drought and PEN treatment induced total phenol content in RGS003. Flavonoid content increased by drought, but Ca and PEN-Ca treatment decreased it in both cultivars. Ca and PEN-Ca treatment enhanced tocopherol content in both cultivars under drought stress. Drought stress increased Phenylalanine ammonia-lyase (PAL) activity in Sarigol. PEN-Ca treatment increased relative expression of PAL and its activity in RGS003. Fatty acid composition was modified by drought, PEN and Ca. Saturated fatty acid (stearic acid) content declined but unsaturated fatty acid (oleic acid) content enhanced in both cultivars under drought. The application of PEN and Ca decreased unsaturated fatty acids (linoleic and linolenic acid) in RGS003 under drought. According to our results, PEN and Ca changed physiological and biochemical parameters and therefore these compounds are suggested for reduction of the negative effects of drought stress in canola.
在水分胁迫条件下，研究了戊唑醇（PEN）和钙（Ca）对两个油菜品种（RGS003和萨里戈尔）生理生化参数的影响。干旱增加了RGS003中的蛋白质含量，但PEN、Ca和PEN-Ca处理诱导了萨里戈尔中的蛋白质含量。PEN、Ca和PEN-Ca处理提高了RGS003中的可溶性糖含量。与萨里戈尔相反，干旱和PEN处理诱导了RGS003中的总酚含量。干旱使类黄酮含量增加，但Ca和PEN-Ca处理在两个品种中均使其降低。在干旱胁迫下，Ca和PEN-Ca处理提高了两个品种中的生育酚含量。干旱胁迫增加了萨里戈尔中苯丙氨酸解氨酶（PAL）的活性。PEN-Ca处理增加了RGS003中PAL的相对表达及其活性。干旱、PEN和Ca改变了脂肪酸组成。在干旱条件下，两个品种中的饱和脂肪酸（硬脂酸）含量下降，但不饱和脂肪酸（油酸）含量增加。在干旱条件下，PEN和Ca的施用降低了RGS003中的不饱和脂肪酸（亚油酸和亚麻酸）。根据我们的结果，PEN和Ca改变了生理生化参数，因此建议使用这些化合物来减轻油菜干旱胁迫的负面影响。
