This study aimed to evaluate the biochemical impact of magnesium (Mg) deficiency on banana cultivars. Seedlings of three banana cultivars, Baxi (Musa, AAA), Haigong (Musa, AA), and Guangfen no.1 (Musa, ABB), with five expanded leaves were sand cultured with nutrient solution containing 10 µM (Mg-deficient) and 1000 µM of MgSO₄. After 12 weeks of Mg deficiency, Mg content in leaves and plant dry biomass was significantly reduced. The superoxide dismutase activity was increased in all three cultivars, while the photosynthesis seems to be unaffected. Differential responses were observed in different cultivars under Mg deficiency, and deficiency symptoms appeared on the leaves of Baxi and Haigong, while no symptoms appeared on Guangfen no. 1. Similarly, the increase in potassium, calcium, sucrose, starch contents and higher lipid peroxidation under Mg deficiency was observed in Baxi and Haigong, while unaffected in Guangfen no. 1. Also, antioxidant enzyme activity of ascorbate peroxidase and glutathione reductase was significantly increased in Haigong and Baxi, respectively. Mg deficiency reduced the biomass and root and shoot dry weight ratio, accompanied by the accumulation of malondialdehyde, sucrose, and starch content. The genetic differences are responsible for the tolerance of Mg deficiency in banana seedlings.

本研究旨在评估镁 (Mg) 缺乏对香蕉品种的生化影响。，八喜（三个香蕉秧苗栽培品种香蕉，AAA），海工（芭蕉，AA），和夜光粉NO.1（芭蕉，ABB）中，用5米展开的叶片用含有10μM（MG-缺陷）和营养溶液砂培养1000 µM MgSO ₄. 缺镁 12 周后，叶片和植物干生物量中的镁含量显着降低。所有三个品种的超氧化物歧化酶活性均增加，而光合作用似乎未受影响。缺镁条件下不同品种的反应存在差异，八喜和海宫叶片出现缺镁症状，广粉1号叶片无缺镁症状。1. 同样，在缺镁条件下钾、钙、蔗糖、淀粉含量增加和脂质过氧化增加在八溪和海工，而广粉1号未受影响。1.此外，海宫和八溪的抗坏血酸过氧化物酶和谷胱甘肽还原酶的抗氧化酶活性分别显着提高。缺镁会降低生物量和根茎干重比，伴随着丙二醛、蔗糖和淀粉含量的积累。遗传差异是香蕉幼苗对镁缺乏耐受性的原因。