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Overexpression of Cassava MeSTP7 Promotes Arabidopsis Seedling Development

文献类型： 外文期刊

作者： Geng, Sha 1 ; Wang, Xiaotong 2 ; Yan, Wei 1 ; Liu, Qian 1 ; Wang, Na 1 ; Zhang, Jianyu 3 ; Guo, Jianchun 2 ; Liu, Jiao 2 ; Luo, Lijuan 3 ;

作者机构： 1.Yunnan Acad Agr Sci, Inst Trop & Subtrop Cash Crops, Baoshan 678000, Peoples R China

2.Chinese Acad Trop Agr Sci, Sanya Res Inst, Inst Trop Biosci & Biotechnol, Natl Key Lab Trop Crop Breeding, Haikou 571101, Peoples R China

3.Hainan Univ, Sch Trop Agr & Forestry, Key Lab Sustainable Utilizat Trop Biol Resources H, Haikou 570228, Peoples R China

4.Hainan Univ, Sanya Inst Breeding & Multiplicat, Sch Breeding & Multiplicat, Sanya 572025, Peoples R China

关键词： cassava; sugar transporter protein; transgenic Arabidopsis; hormone treatment; MeSTP7

期刊名称：PLANTS-BASEL （ 影响因子：4.1； 五年影响因子：4.5 ）

ISSN： 2223-7747

年卷期： 2024 年 13 卷 21 期

页码：

收录情况： SCI

摘要： The sugar transporter (STP) gene family is a key regulator of plant development, which is crucial for the efficient transport and utilization of sugars during plant growth and development. In this study, we identified the MeSTP7 gene, which is highly expressed in cassava fibrous roots, early storage roots, and under hormonal treatment, including IAA, MeJA, ABA, and GA3, and abiotic stressors, such as mannitol and NaCl. A strong response was observed with exoqenous IAA. Transfecting MeSTP7 into Arabidopsis promoted early seedling growth, particularly in lateral root development. The content of endogenous hormones (IAA and MeJA) as well as soluble sugars (sucrose, fructose, and glucose) was elevated in transgenic Arabidopsis. Hormone treatments with IAA, MeJA, GA3, and ABA on transgenic Arabidopsis revealed that transgenic Arabidopsis responded positively to added 20 mu M IAA. They also exhibited co-induced regulation of lateral root formation by GA3, MeJA, and ABA. qRT-PCR analysis showed that overexpression of MeSTP7 upregulated the expression of IAA14, ARF7, and ARF19 in Arabidopsis. Under IAA treatment, the expression of these genes was similarly upregulated but downregulated under MeJA treatment. These results suggest that MeSTP7 may promote Arabidopsis seedling development by increasing the content of sucrose, glucose, and fructose in roots, which in turn influences IAA-based hormonal signaling.

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