This study was conducted to investigate the potential effects of molybdenum (Mo) on cell wall components in both cultivars of winter wheat ( Triticum aestivum L.) by using a pot experiment with two Mo levels (0 and 0.15 mg kg −1 ) at different growth stages. The leaves were sampled at the stages of tillering, jointing, heading, and milky in winter wheat. The results indicated that the contents of cell wall components changed with the stages of wheat growth to adapt to environmental changes, particularly before the stages of heading, the contents of lignin, cellulose, hemicellulose, and protopectin increased with the stages of wheat growth. Mo application markedly increased cellulose contents by 7.60% at the milky stage in a cultivar of 97014. Mo supply dramatically enhanced hemicelluloses contents by 26.93% and 55.41% at tillering and heading stages in a cultivar of 97003 and by 29.16% and 21.43% at jointing and heading stages in a cultivar of 97014, respectively. Mo supply significantly increased protopectin contents by 78.04%, 108.71%, and 40.62% in a cultivar of 97003 and by 89.70%, 97.03%, and 31.53% in a cultivar of 97014 at tillering, jointing, and heading stages. The increased contents of cell wall components will contribute to improving mechanical strength of leaves. However, the decreased contents of hemicelluloses, soluble pectin by Mo supply were observed at milky stages in wheat. The ratios of soluble pectin to protopectin were decreased by Mo application, confirmed by the decreased activities of pectin methylesterase (PME) in both cultivars of wheat at jointing and milky stages, suggesting that Mo inhibited the conversion of protopectin to soluble pectin by inhibiting PME activity. Overall, the components of the cell wall were affected by Mo, mainly affected the contents of hemicellulose, soluble pectin, and protopectin.

中文翻译：

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钼对不同生育阶段小麦叶片细胞壁成分的影响

本研究旨在通过使用两种钼含量（0 和 0.15 mg kg -1 ）的盆栽试验，研究钼 (Mo) 对两种冬小麦（ Triticum aestivum L. ）品种细胞壁成分的潜在影响。成长阶段。在冬小麦分蘖、拔节、抽穗和乳白色阶段对叶片进行取样。结果表明，细胞壁成分的含量随着小麦生长阶段的变化而变化，以适应环境变化，特别是抽穗前，木质素、纤维素、半纤维素和原果胶的含量随着小麦生长阶段的增加而增加。在 97014 品种的乳状阶段，钼的施用显着增加了 7.60%。钼的供应使半纤维素含量显着提高了 26.93% 和 55%。品种 97003 在分蘖期和抽穗期分别为 41%，在品种 97014 的拔节期和抽穗期分别为 29.16% 和 21.43%。在分蘖期、拔节期和抽穗期，钼供应使97003品种的原果胶含量显着提高了78.04%、108.71%和40.62%，而97014品种的原果胶含量显着提高了89.70%、97.03%和31.53%。细胞壁成分含量的增加将有助于提高叶片的机械强度。然而，在小麦乳状阶段观察到由钼供给导致的半纤维素、可溶性果胶含量降低。Mo 施用降低了可溶性果胶与原果胶的比率，这证实了两种小麦品种在拔节期和乳汁期果胶甲酯酶 (PME) 的活性降低，表明 Mo 通过抑制 PME 活性来抑制原果胶向可溶性果胶的转化。总体而言，细胞壁成分受Mo的影响，主要影响半纤维素、可溶性果胶和原果胶的含量。