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c Y刘厚诚1 , 邝炎华2 , 陈日远1(1 2 j= R R。 / =K Z 7=ABAc 6, ( 6P = R R, ABAc = RP R; / =ABAc 6, 6 R= RP 。 / =ABAc 9F V ? s 、h V, aB。1oM:; ;ABAc ms |:Q945.1 DS M :A cI|:1008-505X(2004)06-0629-04Effect of phosphorus-deficiency stress on abscisic acid contents inasparagus bean seedlingsLIU Hou-cheng1 , KUANG Yan-hua2, CHEN Ri-yuan1(1 Collegeof Hort., South China Agric.Univ., Guangzhou 510642 , China ;2 College of LifeSci.,South China Agric.Univ., Guangzhou510642 , China)Abstract:Under phosphorus-deficiency stress, changes of abscisic acid (ABA)contents in seedling of three asparagusbean Vigna unquiculata W .ssp.sesquipedalis (L .)Verd cultivars differing in tolerance to phosphorus-deficiencywere studied.The results showed that ABA contents in root increased under P-deficiency stress, ABA contents declinedearly , then increased to a peak, and declined again, the peak appeared earlier in cv .Erlubai (Low P-deficiency-toler-ance)than cv .Luhuabai (High P-deficiency-tolerance).The increase in cv .Xianggangqing cv .Erlubai cv.Luhuabai.The ABA contents in older leaf, stem and youngest fully-expanded leaf increased under P-deficiency stress,the increase in cv.Xianggangqing cv.Erlubai cv .Luhuabai , but that in cv.Erlubai cv .Xianggangqing cv.Luhuabai at later stage .The ABA contents in younger leaf and stem increased under P-deficiency stress, the increase incv.Luhuabai cv .Erlubaicv .Xianggangqing.The increase of ABA contents in leaf and stem under P-deficiencystress might enhance transportation of phosphorus and water, reduce membrane lipid peroxidation .Key words:asparagus bean;phosphorus-deficiency stress;ABA contentsl :2003-09-27 l :2003-12-18Te: (1968), 3, 2 ,p V, q,1V Y v 3 。 (ABA)8 = ?, = , d1, 3, s “ 3,“ ?,i VT W| T 1 。 y l、e 、HqT/,ABA 6,iB“ 3 M, 3h 3, a 。ABA |T,yN$“ ” 1 。 F ? , ABAQ T V ? 。! / 3 3 3M,! +Y /ABAM 。 k 0 ? /sABAc M,kms 0 ? ABAQW1“。1 ZEk 0 2 : R( 0 )、P (W )、= R( 0 !g 2004, 10(6):629-632Plant Nutrition and Fertilizer Science)。Hoagland Z, !(+P) (-P)2) , ) KK2SO4 , iZE 2 ! 。 |vlB0l b 5,1 5 A 。l7d ,1= sZ 7 H, | 3B,0=,!“M Q( 20L), v%, Q20。!A 7dBQ, ,Y ( 30minY 10min)。M3d 7 S 2d |“1Q,|“s:“、K Z 7=、 =(K Z 7=/)、 =(K Z 7=)。 |“ b-80bQ i,ELISAZE 3 (0 2 j Z 7=ABAc M / K Z 7=ABAc M(m3)。 +P) RK Z 7=ABAc t , -P+P) M , 6, (1+P) 6 50.80%。 +P) = RK Z 7=ABAc ! - 6,11d 7 S/,7-P) WABAc wLM,sY511dC, (1+P482.48%。+P) P K Z 7=ABAc !5d -, 5 7d 6,;-PM+P) M , (1+P 6630!g 10 88.43%。 / K Z 7=ABAc 6, 6Kv P ,Q = R, RKl, = RABAc 1 。m2 / =ABAc MFig.2 Change of ABA content in elder leaf of asparagus bean seedlings under P-deficiency stressm3 / K Z 7=ABAc MFig.3 Change of ABA content in youngest fully expending leaf of asparagus bean seedlings under P-deficiency stress2.4 / =ABAc Mm4 A, +P) R =ABAc ! W/ t , -PM+P) M , (1+P 6 62.13%。+P) = R =ABAc 9/ t ,1 R ,7-P) ABAc wLM,C 7d , (1+P) 6 53.02%。+P) P =ABAc o t , -P+P) M , (1+P 6 20.38%。 =ABAc 3 ( 6, R 6Kv,P Kl。m4 / =ABAc MFig.4 Change of ABA content in new leaf of asparagus bean seedlings under P-deficiency stress6316 ,: c Y3 ) V ,! s 3 ABAc 1!* O q y 4 , H d9 y。 /6 =ABA i 9F7 AM 5 , !ABA 9F6,=ABA ,= - q,7 O ?“ n q,9F_ ;8 =ABA F I9 Z 7=ABAc 6sYP = RK;7 = RK。I NABA JlM8 Hq/ 3 s YV 3 7 ;ABA i9F7 sr KI N 3 8 ;Y JyI NM1,7 3I NV Y 3 31y 9 ,77 3YVr ABAsh Y 3, H9s 3 10 。 / =ABAc 9F V ?“d !s s ,9 V ?h V,i VV Y 3V7= 3, aB。 0 R1 0 = R ? = 3。 ABAc 6 V ? 1,= RABAc 1 R, P= R1R ,VC ,i. / 3Q A .S j.S M j S M C .:S j, 1999.913-917. 3 ,o,. f%M EELISA = J . 3 Y, 1988(5):53-57. 4 Radin J W.Stomatal response to water stress and to abscisic acid inphosphorus deficient cotton plants J .Plant Physiol ., 1984, 76:392-394. 5 Jeschke W D, Peuke A U, Palo J S et al .Transport , synthesis andmetabolism of abscisic acid (ABA)in intact plant of castor bean(Rici-nus cvmmunis L .)under phosphate deficiency and moderate salinity J .J.Exp.Bot .,1997, 48:1737-1747. 6 7d,. # f_/ M . 2: S/ , 1996.124-132, 176-196. 7 Sharp R E, LeNoble M E, Else M A et al .Endogenous ABA maintainshoot growth in tomato independently of effects on plant water balance :Evidence for an interaction with ethylene J .J.Ext.Bot., 2000, 51:1575-1584. 8 Roberts J A, Hussain A ,Taylor I B, Black C R .Use of mutants to studylong-distance signaling in response to compaction strees J .J.Ext .Bot., 2002, 53:45-50. 9 Hussain A, Taylor I B, Black C R, Roberts J A .Soil compaction.A roleof ethylene in regulating leaf expansion and shoot growth in tomato J .Plant Physiol., 1999, 121:1227-1237. 10 Hussain A , Taylor I B, Black C R, Roberts J A .Does an antagonisticrelationship between ABA and ethylene mediate shoot growth when toma-to (Lycopersicon esculentum Mill.)plants encounter compacted soil J .Plant ,Cell and Envir., 2000,23:1217-1226.632!g 10
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