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近红外光谱技术在植物组分与特性研究中的应用   总被引:2,自引:0,他引:2  
近红外光谱被广泛应用到许多植物的各个组织和各种成分的分析,是20世纪90年代以来发展最快、最引人注目的光谱分析技术.本文阐述了近红外光谱的发展、技术特点,介绍了近红外光谱分析技术的数据处理方法.重点列举了近几年近红外光谱分析技术在植物分类、植物胁迫评估、植物组分及功能性质检测和杂草识别研究中的应用,并分析了该技术的发展...  相似文献   
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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   
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Aluminum (Al) toxicity is the major factor limiting crop productivity in acid soils. In this study, a recombinant inbreed line (RIL) population derived from a cross between an A1 sensitive lowland indica rice variety IR1552 and an Al tolerant upland japonica rice variety Azucena, was used for mapping quantitative trait loci (QTLs) for A1 tolerance. Three QTLs for relative root length (RRL) were detected on chromosome 1, 9, 12, respectively, and I QTL for root length under Al stress is identical on chromosome I after one week and two weeks stress. Comparison of QTLs on chromosome 1 from different studies indicated an identical interval between C86 and RZ801 with gene(s) for Al tolerance. This interval provides an important start point for isolating genes responsible for A1 tolerance and understanding the genetic nature of Al tolerance in rice. Four Al induced ESTs located in this interval were screened by reverse Northern analysis and confirmed by Northern analysis. They would be candidate genes for the QTL.  相似文献   
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越橘(Vaccinium vitis-idaea具有明目、防止脑神经衰老、抗癌等功效,还可用于天然食用色素的提取,是一种极具发展潜力的第3代新兴水果,其研究对指导生产实际有重要的实用价值。本文综述了越橘对各种逆境胁迫的生理响应,具体分析了温度、水分、重金属和光胁迫对越橘生长、产量和生理方面的影响以及不同品种的越橘对各种胁迫的适应性,为不同地区的越橘种植提供参考。分析发现,抗寒能力较好的是"北村"和"美登",而耐热能力较好的是"夏普蓝"。"北村"和"奥尼尔"适合干旱地区种植,"艾朗"、"蓝丰"和"科丽尔"适合在多雨水地区种植。  相似文献   
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INTRODUCTION Aluminum (Al) toxicity is one of the mostimportant yield-limiting factors for crop grown onacid upland and lowland acid sulphate soils (IRRI,1978). Al toxicity results in a reduced and damagedroot system, which in turn causes the affectedplants to be susceptible to drought stress and min-eral nutrient deficiencies (Foy, 1988). The physio-logical and biochemical mechanisms of the toxiceffect of Al on root elongation had been extensivelyinvestigated (Matsumoto, 2000). T…  相似文献   
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梅花成花及其调控研究进展   总被引:1,自引:0,他引:1  
梅花居中国十大传统名花之首,在我国具有极其重要的地位。本文从梅花生态生物学特性、花芽分化机理和梅花品种选择、植物生长调节剂、水分养分及园艺措施、盆栽梅花花期调控等方面对梅花花期调控的研究进行了综述。同时展望梅花花期调控今后的研究方向,以期为梅花花期调控深入研究提供参考。  相似文献   
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芒属观赏草的研究进展   总被引:1,自引:0,他引:1  
芒属植物是一类重要的观赏草.本文介绍了观赏草的概念和应用历史,总结了我国芒属植物的资源及分布,并从品种选育、抗性研究和园林应用三个方面介绍了芒属观赏草的研究现状,最后指出存在的问题及对策.  相似文献   
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INTRODUCTIONOryzasativaL .riceisasemi aquaticspe ciesadaptedtoavarietyofclimates.Uplandricedependsmainlyonrainfall,isoftenexposedtodrought,andhasdevelopeddroughtresistanttraits.Aprincipalmechanismbywhichriceadaptstowaterdeficiencyisthroughtheposses sionof…  相似文献   
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