江西农业大学学报
江西農業大學學報
강서농업대학학보
ACTA AGRICULTURAE UNIVERSITATIS JIANGXIENSIS
2013年
6期
1119-1125
,共7页
吴自明%石秀兰%石庆华%潘晓华
吳自明%石秀蘭%石慶華%潘曉華
오자명%석수란%석경화%반효화
早籼稻%夜温升高%光合作用%Rubisco酶%保护酶活性
早秈稻%夜溫升高%光閤作用%Rubisco酶%保護酶活性
조선도%야온승고%광합작용%Rubisco매%보호매활성
early indica rice%nighttime temperature increase%photosynthesis%Rubisco enzyme%protective enzyme
为了探明夜温升高对早籼稻生育后期生长的影响,对两间玻璃室采用开、关窗两种方式以创造夜间不同温度条件,以不同类型早籼稻品种为材料,研究了夜温升高对不同类型早籼稻品种灌浆期光合作用及保护酶活性的影响。结果表明,夜温升高导致早籼稻灌浆期功能叶片的净光合速率( Pn )、Rubisco酶及保护酶活性不同程度地下降,丙二醛( MDA)含量增加。不同类型早籼稻品种灌浆期光合作用及保护酶活性对夜温升高的响应存在差异:杂交品种Pn夜温升高时下降幅度小于常规品种;灌浆期杂交品种Rubisco酶和保护酶活性较常规品种高,但其夜温升高时下降幅度大于常规品种;灌浆中后期常规品种夜温升高时MDA含量增加较杂交品种明显。结论是夜温升高缩短了不同早籼稻品种灌浆期光合速率高值持续期,加速了叶片保护酶活性下降,导致膜脂过氧化加剧,杂交品种较常规品种更能耐受夜温升高的影响。
為瞭探明夜溫升高對早秈稻生育後期生長的影響,對兩間玻璃室採用開、關窗兩種方式以創造夜間不同溫度條件,以不同類型早秈稻品種為材料,研究瞭夜溫升高對不同類型早秈稻品種灌漿期光閤作用及保護酶活性的影響。結果錶明,夜溫升高導緻早秈稻灌漿期功能葉片的淨光閤速率( Pn )、Rubisco酶及保護酶活性不同程度地下降,丙二醛( MDA)含量增加。不同類型早秈稻品種灌漿期光閤作用及保護酶活性對夜溫升高的響應存在差異:雜交品種Pn夜溫升高時下降幅度小于常規品種;灌漿期雜交品種Rubisco酶和保護酶活性較常規品種高,但其夜溫升高時下降幅度大于常規品種;灌漿中後期常規品種夜溫升高時MDA含量增加較雜交品種明顯。結論是夜溫升高縮短瞭不同早秈稻品種灌漿期光閤速率高值持續期,加速瞭葉片保護酶活性下降,導緻膜脂過氧化加劇,雜交品種較常規品種更能耐受夜溫升高的影響。
위료탐명야온승고대조선도생육후기생장적영향,대량간파리실채용개、관창량충방식이창조야간불동온도조건,이불동류형조선도품충위재료,연구료야온승고대불동류형조선도품충관장기광합작용급보호매활성적영향。결과표명,야온승고도치조선도관장기공능협편적정광합속솔( Pn )、Rubisco매급보호매활성불동정도지하강,병이철( MDA)함량증가。불동류형조선도품충관장기광합작용급보호매활성대야온승고적향응존재차이:잡교품충Pn야온승고시하강폭도소우상규품충;관장기잡교품충Rubisco매화보호매활성교상규품충고,단기야온승고시하강폭도대우상규품충;관장중후기상규품충야온승고시MDA함량증가교잡교품충명현。결론시야온승고축단료불동조선도품충관장기광합속솔고치지속기,가속료협편보호매활성하강,도치막지과양화가극,잡교품충교상규품충경능내수야온승고적영향。
In order to study the effect of nighttime temperature increase on growth of early indica rice ,u-sing different early indica rice varieties to study the photosynthesis and protective enzyme activity during the filling stage,two glasshouses were used to establish different nighttime temperatures .The results showed that higher nighttime temperature decreased net photosynthetic rate (Pn),Rubisco and protective enzyme activity to different extent,but increased MDA content at the filling stage .There were significant different responses to higher nighttime temperature in different varieties of early indica rice .The Pn of early hybrid rice dropped less than that of common early rice .The activities of Rubisco and protective enzymes in early hybrid rice were high-er than those of common early rice , but they decreased more than in common early rice affected by higher nighttime temperature .The MDA content was higher in common early rice during the middle-late filling stage .The conclusion was that higher nighttime temperature shortened the period of higher photosynthesis rate , and sped up the decrease of protective enzymes activity ,leading the membrane lipid peroxidation .Early hybrid rice endured hihter nighttime temperature better than common early rice .