中国农业科技导报
中國農業科技導報
중국농업과기도보
REVIEW OF CHINA AGRICULTURAL SCIENCE AND TECHNOLOGY
2013年
5期
150-156
,共7页
硝酸盐%玉米自交系郑58%根生长%全氮含量
硝痠鹽%玉米自交繫鄭58%根生長%全氮含量
초산염%옥미자교계정58%근생장%전담함량
nitrate%maize inbred line Zheng58%root growth%total N content
NO-3的有效性对玉米根系形态的影响是近年来的研究热点。为了解玉米根系形态对硝酸盐浓度变化的应答，以自交系郑58为材料，分析了短时间内NO-3浓度的变化和局部NO-3处理对苗期根系性状、植株生物量、根冠比以及植株全氮含量的影响。结果显示，短时间的高氮（10 mmol/L）处理能够促进主根伸长，抑制侧根萌发；低氮（0．04 mmol/L）处理促进侧根的生长和根系干物质累积，增加根冠比；而缺氮和局部供氮均抑制了侧根伸长。分析植株生物量及全氮含量对侧根生长的影响表明，植株干重与侧根长之间、植株全氮含量与侧根密度之间有相关性。根系性状表型数据和定量指标分析表明，环境中硝酸盐浓度的改变首先引起郑58侧根生长的变化。
NO-3的有效性對玉米根繫形態的影響是近年來的研究熱點。為瞭解玉米根繫形態對硝痠鹽濃度變化的應答，以自交繫鄭58為材料，分析瞭短時間內NO-3濃度的變化和跼部NO-3處理對苗期根繫性狀、植株生物量、根冠比以及植株全氮含量的影響。結果顯示，短時間的高氮（10 mmol/L）處理能夠促進主根伸長，抑製側根萌髮；低氮（0．04 mmol/L）處理促進側根的生長和根繫榦物質纍積，增加根冠比；而缺氮和跼部供氮均抑製瞭側根伸長。分析植株生物量及全氮含量對側根生長的影響錶明，植株榦重與側根長之間、植株全氮含量與側根密度之間有相關性。根繫性狀錶型數據和定量指標分析錶明，環境中硝痠鹽濃度的改變首先引起鄭58側根生長的變化。
NO-3적유효성대옥미근계형태적영향시근년래적연구열점。위료해옥미근계형태대초산염농도변화적응답，이자교계정58위재료，분석료단시간내NO-3농도적변화화국부NO-3처리대묘기근계성상、식주생물량、근관비이급식주전담함량적영향。결과현시，단시간적고담（10 mmol/L）처리능구촉진주근신장，억제측근맹발；저담（0．04 mmol/L）처리촉진측근적생장화근계간물질루적，증가근관비；이결담화국부공담균억제료측근신장。분석식주생물량급전담함량대측근생장적영향표명，식주간중여측근장지간、식주전담함량여측근밀도지간유상관성。근계성상표형수거화정량지표분석표명，배경중초산염농도적개변수선인기정58측근생장적변화。
Recently, the effect of NO-3 availability on maize root morphology is a research hotspot. To understand the response of maize root morphology to changes in nitrate concentration, this paper used maize inbred line Zheng 58 as material, and analyzed the effect of changes in nitrate concentration within a short time, and partial NO-3 treatment on seedling root characteristics, plant biomass, root/shoot ratio and total N content of plants. The results showed that treatment of high concentration of N ( 10 mmol/L) for a short time could promote main root elongation and inhibit lateral root germination. Treatment of low N concentration (0.04 mmol/L) could promote lateral root growth and dry matter accumulation in root system, and increased root/shoot ratio. Moreover, N deficiency and partial N supply inhibited lateral root elongation. The effect of plant biomass and total N content on lateral root growth showed there were correlation between plant dry weight and lateral root length and between total N content and lateral root density. Root system characteristics phenotype data and quantitative index analysis showed that changes of nitrate concentration in environment would firstly cause the change in growth of Zheng58?s lateral root.
