Comparative genomics of light harvesting chlorophyll (LHC) gene family and impact of chlorophyll-A contents under drought stress in Helianthus annuus
文献类型： 外文期刊
第一作者： Zaib, Parwsha
作者： Zaib, Parwsha;Ahmad, Hafiz Muhammad;Rahman, Mahmood-Ur;Attacha, Safira;Shafiq, Muhammad Rizwan;Parveen, Kousar;Fiaz, Sajid;Attia, Kotb A.;Ishaq, Saira;Arif, Shazia;Abushady, Asmaa M.;Abushady, Asmaa M.;Umer, Muhammad Jawad
作者机构：
关键词： Chlorophyll contents; Drought; Genome-wide analysis; Water stress
期刊名称：JOURNAL OF PLANT PHYSIOLOGY （ 影响因子：4.3； 五年影响因子：4.5 ）
ISSN： 0176-1617
年卷期： 2023 年 291 卷
页码：
收录情况： SCI
摘要： Drought is one of the main environmental stressors that can alter the water status of plants; negatively affect growth, assimilation, and photosynthesis; and eventually reduce crop yield. We explored the dependence of drought tolerance traits on chlorophyll-A content. Local sunflower cultivars (FH-01, FH-628, FH-633, FH-572, and FH-653) were grown in pots and subjected to drought by withholding water for 10, 15, or 20 d. One month after germination, the leaves of the treated and non-treated plants were collected and subjected to biochemical analyses. Under different water stress levels, the levels of peroxidase (POD), superoxide dismutase (SOD), catalase (CAT), and proline increased, whereas those of chlorophyll-A decreased. Regression analysis clearly found that proline (-0.442), POD (-0.528), SOD (-0.532), and CAT (-0.814) have negative beta coefficient values. Phylogenetic analysis revealed that the LHC gene family is divided into six clades. Subcellular locations indicated that most LHC genes were located in the chloroplast; however, only few genes were present in the peroxisomes and endoplasmic reticulum. Our research found that Arabidopsis oliana LHC genes were highly homologous to the LHC genes of Helianthus annuus. Furthermore, the LHC genes of both species are located in the chloroplasts; therefore, they play a role in photosynthesis and renewable energy production. This study opens a new horizon for discussing the role of chlorophyll-A in the drought-related traits of sunflowers.
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