人工控制条件下生长的小麦、玉米分别培养在含0、0.5、1.0和2.0mM SO_4^(-2)4个硫营养水平的Hoagland 培养液中,对2—6周龄的植株进行了 RuBPCase、PEPCase、NR 的活性,叶片可溶性蛋白质含量,叶绿素 a 和 b 含量以及植株最终叶面积和总...人工控制条件下生长的小麦、玉米分别培养在含0、0.5、1.0和2.0mM SO_4^(-2)4个硫营养水平的Hoagland 培养液中,对2—6周龄的植株进行了 RuBPCase、PEPCase、NR 的活性,叶片可溶性蛋白质含量,叶绿素 a 和 b 含量以及植株最终叶面积和总干重的测定。结果指出,硫营养不足影响了作物的碳、氮代谢,随着供硫量的增加,上述各参数值均得到了有利于植物生长发育的改善,说明一定量的硫营养是氮代谢所必需的,硫对碳代谢的影响恐怕是与其对蛋白质和酶的影响相联系的。展开更多
溶液培养试验结果表明:S 素营养对碳索同化有重要影响,缺 S 水稻叶绿素含量及光合作用速率明显降低,植株体内糖、淀粉含量下降;供 S 不足还影响了水稻蛋白质的合成,植株体内游离氨基酸总量及非蛋白态氮含量提高,而蛋白态氮含量下降.此外...溶液培养试验结果表明:S 素营养对碳索同化有重要影响,缺 S 水稻叶绿素含量及光合作用速率明显降低,植株体内糖、淀粉含量下降;供 S 不足还影响了水稻蛋白质的合成,植株体内游离氨基酸总量及非蛋白态氮含量提高,而蛋白态氮含量下降.此外,S 还影响水稻对其他矿质元素的吸收.供 S 可显著提高水稻产量.展开更多
Sulfate uptake and distribution in plants are managed by the differential expression of a family of transporters, developmentally, spatially, and in response to sulfur nutrition. Elucidation of the signaling pathways ...Sulfate uptake and distribution in plants are managed by the differential expression of a family of transporters, developmentally, spatially, and in response to sulfur nutrition. Elucidation of the signaling pathways involved requires a knowledge of the component parts and their interactions. Here, the expression patterns of the full complement of sulfate transporters in wheat, as influenced by development and sulfur nutrition, are described. The 10 wheat sulfate transporters characterized here are compared to the gene families for both rice and Brachypodium, for whom full genome information is available. Expression is reported in young seedlings with a focus on roles in uptake from nutrient solution and differential expression in relation to sulfate deprivation. In addition, patterns of expression in all organs at the grain filling stage are reported and indicate differential responses to nutritional signals of the individual transporters in specific tissues and an overall coordination of uptake, storage, and remobilization to deliver sulfur to the developing grain.展开更多
文摘人工控制条件下生长的小麦、玉米分别培养在含0、0.5、1.0和2.0mM SO_4^(-2)4个硫营养水平的Hoagland 培养液中,对2—6周龄的植株进行了 RuBPCase、PEPCase、NR 的活性,叶片可溶性蛋白质含量,叶绿素 a 和 b 含量以及植株最终叶面积和总干重的测定。结果指出,硫营养不足影响了作物的碳、氮代谢,随着供硫量的增加,上述各参数值均得到了有利于植物生长发育的改善,说明一定量的硫营养是氮代谢所必需的,硫对碳代谢的影响恐怕是与其对蛋白质和酶的影响相联系的。
文摘溶液培养试验结果表明:S 素营养对碳索同化有重要影响,缺 S 水稻叶绿素含量及光合作用速率明显降低,植株体内糖、淀粉含量下降;供 S 不足还影响了水稻蛋白质的合成,植株体内游离氨基酸总量及非蛋白态氮含量提高,而蛋白态氮含量下降.此外,S 还影响水稻对其他矿质元素的吸收.供 S 可显著提高水稻产量.
文摘Sulfate uptake and distribution in plants are managed by the differential expression of a family of transporters, developmentally, spatially, and in response to sulfur nutrition. Elucidation of the signaling pathways involved requires a knowledge of the component parts and their interactions. Here, the expression patterns of the full complement of sulfate transporters in wheat, as influenced by development and sulfur nutrition, are described. The 10 wheat sulfate transporters characterized here are compared to the gene families for both rice and Brachypodium, for whom full genome information is available. Expression is reported in young seedlings with a focus on roles in uptake from nutrient solution and differential expression in relation to sulfate deprivation. In addition, patterns of expression in all organs at the grain filling stage are reported and indicate differential responses to nutritional signals of the individual transporters in specific tissues and an overall coordination of uptake, storage, and remobilization to deliver sulfur to the developing grain.
