水氮互作对水稻茎叶中氮形态及部分无机元素含量的影响   总被引：4，自引：0，他引：4  

朱维琴  吴良欢  陶勤南 《科技通报》2004,20(1):1-5

采用聚乙二醇(PEG6000)模拟水稻干旱胁迫方法，研究了水氮逆境下不同品种水稻茎叶氮素形态及部分无机离子含量的变化．研究结果表明，干旱胁迫使水稻茎叶中可溶性蛋白(SP)、全P、Na^ 含量降低，而对水稻体内全氮(TN)、蛋白态氮(prN)、非蛋白态氮(NprN)及K^ 、Ca^2 、Mg^2 含量的影响因品种而异，且与供氮水平有关．干旱胁迫下，氮素营养可明显增加水稻茎叶可溶性蛋白(SP)、全氮(TN)、蛋白氮(prN)及非蛋白氮(NprN)、全P、K^ 、Na^ 含量，但对Ca2^2 及Mg^2 含量的影响具有品种间差异性。  相似文献   

Seminal,adventitious and lateral root growth and physiological responses in rice to upland conditions     

杨玲  郑炳松  毛传澡  易可可  吴运荣  吴平  陶勤南 《浙江大学学报(A卷英文版)》2003,4(4):469-473

Understanding the growth and physiological responses of rice to upland conditions would be helpful for designing treatments to improve the tolerance of rice under a rainfed system. The objective of this study was to investigate the initiation, elongation and membrane stability of seminal, lateral and adventitious roots of upland rice after 9-d upland condition treatment. Compared with control roots under waterlogged conditions, upland water deficiency conditions favor seminal and lateral root growth over adventitious root growth by accelerating seminal root elongation, promoting lateral root initiation and elongation, and reducing the elongation and number of adventitious roots. Enhanced total root number and length resulted in increase of total root dry weight and thereby increasing the root-to-shoot ratio. Organic compound leakage from seminal root tips and adventitious roots increased progressively to some extent with upland culture duration, while significant increases in semial root tips were the consequence of loss of membrane integrity caused by the upland-condition enhanced growth. Project (No. G1999011700) supported by National Key Basic Research Special (863) Foundation of China  相似文献   

氮形态对植物生长和品质的影响及其机理   总被引：11，自引：0，他引：11  

王华静  吴良欢  陶勤南 《科技通报》2005,21(1):50-55

就两种主要无机氮源——铵态氮和硝态氮对植物生长和品质的影响,对植物矿质元素的组成、植物酶活性的影响及其在相互作用关系等方面的最新进展作了综述,并对有机氮在有机农业和绿色食品中应用前景作了展望。  相似文献   

干旱逆境对不同品种水稻生长、渗透调节物质含量及保护酶活性的影响   总被引：16，自引：0，他引：16  

朱维琴  吴良欢  陶勤南 《科技通报》2006,22(2):176-181

采用PEG-6000模拟干旱胁迫研究表明,干旱胁迫后不同水、陆稻品种茎叶所受生长抑制强于根系所受抑制,但是旱稻品种巴西陆稻对干旱逆境具有较强的生长适应能力,与常规稻品种相比,旱稻品种巴西陆稻所受的生长抑制相对较小。干旱胁迫条件下,不同水陆稻品种叶片中可溶性糖(SS)含量、游离氨基酸总量(TFA)、游离脯氨酸(Pro)含量、POD活性、CAT活性均呈一致的上升趋势,且旱稻品种巴西陆稻具有较强的有机渗透调节能力和酶促抗氧化能力,干旱胁迫后其叶片中各相应指标的变化幅度均显著高于常规稻品种。  相似文献   

Seminal, adventitious and lateral root growth and physiological responses in rice to upland conditions     

杨玲  郑炳松  毛传澡  易可可  吴运荣  吴平  陶勤南 《Journal of Zhejiang University. Science. B》2003,(4)

INTRODUCTIONOryzasativaL .riceisasemi aquaticspe ciesadaptedtoavarietyofclimates.Uplandricedependsmainlyonrainfall,isoftenexposedtodrought,andhasdevelopeddroughtresistanttraits.Aprincipalmechanismbywhichriceadaptstowaterdeficiencyisthroughtheposses sionof…  相似文献