Alcântara Berenice K, Rizzi Vanessa, Gaziola Salete A, Azevedo Ricardo A
Departamento de Genética, Escola Superior de Agricultura "Luiz de Queiroz", USP, Piracicaba, SP, Brazil.
An Acad Bras Cienc. 2017 May;89(1 Suppl 0):695-704. doi: 10.1590/0001-3765201720160399. Epub 2017 Apr 27.
Both the scientific community and society have shown interest in improving the content of amino acids, carbohydrates and mineral nutrients in maize because it represents an important staple food in many developing countries. Earlier studies demonstrated that the treatment of seeds using ascorbic acid (AsA-seed priming) enhanced soluble carbohydrates, proteins and soluble amino acids for other species. AsA seed priming in maize showed the potential for reducing abiotic stresses. The effects on grain quality have not been previously demonstrated. This study investigated the impacts of AsA seed priming on maize kernel quality of seeds produced by the plants generated from the primed seeds, based on the amino acid profile and carbohydrate and mineral nutrient contents. AsA seed priming improved the maize kernel quality with respect to the ascorbate content, boron allocation, total carbohydrate content and increased soluble amino acid levels, including serine, tyrosine, alanine, valine, glutamate, arginine, proline, aspartate, lysine and isoleucine, whereas soluble methionine was decreased. Therefore, AsA seed priming can represent a potential technique for improving maize grain quality.
科学界和社会都对提高玉米中氨基酸、碳水化合物和矿物质营养素的含量表现出兴趣，因为玉米是许多发展中国家的重要主食。早期研究表明，用抗坏血酸处理种子（抗坏血酸引发种子）可提高其他物种的可溶性碳水化合物、蛋白质和可溶性氨基酸含量。玉米中的抗坏血酸引发种子显示出减轻非生物胁迫的潜力。此前尚未证明其对谷物品质的影响。本研究基于氨基酸谱以及碳水化合物和矿物质营养素含量，调查了抗坏血酸引发种子对由引发种子产生的植株所结种子的玉米籽粒品质的影响。抗坏血酸引发种子提高了玉米籽粒品质，表现在抗坏血酸含量、硼分配、总碳水化合物含量方面，并提高了可溶性氨基酸水平，包括丝氨酸、酪氨酸、丙氨酸、缬氨酸、谷氨酸、精氨酸、脯氨酸、天冬氨酸、赖氨酸和异亮氨酸，而可溶性蛋氨酸含量降低。因此，抗坏血酸引发种子可能是一种提高玉米籽粒品质的潜在技术。
