The Study of Selenium Fertilizer on the Growth of Xiangzayou 787 and Related Molecular Mechanism

Agronomy Pub Date : 2024-09-06 DOI:10.3390/agronomy14092032
Qi Zhang, Jiayuan Peng, Yuqi Liu, Chunfeng Xie, Zhenqian Zhang
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Abstract

Rapeseed is the largest self-produced oil crop in China which plays an important role in ensuring the safety of edible oil. However, its current per unit yield is far below Canada and Europe. In this study, selenium fertilizer and other micro fertilizers were sprayed on Xiangzayou 787 at the seedling stage. The results showed that the yield per plant increased 24.3% with sprayed selenium compared to the control (CK). Compared with the CK, the chlorophyll content in leaves at the flowering stage was significantly increased by 20.8%, and the soluble sugar content in the silique wall and seeds at the maturity stage was significantly increased and increased by 62.1% during the budding stage. The functional leaves of Xiangzayou 787 with the sprayed selenium fertilizer and the CK were used as raw materials for absolute quantitative transcriptome sequencing analysis. Accompanied with bioinformatics analysis, six differential genes which affect growth were discovered. The expression level of the protein phosphatase 2C gene in the silique wall was significantly higher than that of the CK. The PP2C78 gene was significantly positively correlated with the chlorophyll and soluble sugar content in leaves and the correlation coefficients were 0.539 and 0.547. According to gene expression levels, yield, and physiological indicators, PP2C78 may be a key functional gene affecting rapeseed yield. In this study, selenium fertilizer was found to be an excellent foliar fertilizer for rapeseed; the PP2C78 gene may be helpful for analyzing the yield increasing mechanism and used as a reference for screening new foliar fertilizers.
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硒肥对项泽友 787 生长的影响及相关分子机理研究
油菜籽是中国最大的自产油料作物,在确保食用油安全方面发挥着重要作用。然而,其目前的单产远远低于加拿大和欧洲。本研究在湘杂油菜 787 苗期喷施硒肥和其他微肥。结果表明,与对照组(CK)相比,喷硒后单株产量提高了 24.3%。与 CK 相比,开花期叶片中的叶绿素含量显著增加了 20.8%,成熟期蒴果壁和种子中的可溶性糖含量显著增加,萌芽期增加了 62.1%。以喷施硒肥的湘杂优 787 功能叶和 CK 为原料,进行绝对定量转录组测序分析。通过生物信息学分析,发现了 6 个影响生长的差异基因。其中,蛋白磷酸酶 2C 基因在纤丝壁中的表达水平明显高于 CK。PP2C78 基因与叶片中叶绿素和可溶性糖含量呈显著正相关,相关系数分别为 0.539 和 0.547。从基因表达水平、产量和生理指标来看,PP2C78可能是影响油菜产量的关键功能基因。本研究发现,硒肥是一种优良的油菜叶面肥;PP2C78基因可能有助于分析油菜增产机理,并为筛选新的叶面肥提供参考。
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