低温锻炼对冷胁迫下甜瓜幼苗抗氧化酶活性与质膜透性的影响.pdf

 j,V7 P ȳÉv “1,ÁF®Ï žAȝ q9v[6] 。Vm1 V[A,2 ℃¥ Ï} ç/, îµ Ø¥C¼ ìMȝ q Û Ï} ç HW¥9F7  6,Œ Ü®Ñ ÿ¥T1„T2 ØÐÃÜ ÿ¥CKM1 ,V Ï} 祻 7 S,®Ñ ÿ üA]ÅÏ} ç/Mȝ q¥  6, O»2～ 3 ,T1„T2 Ø ÐCKµA÷µsP 0.01,Œ»4€ÐCKµA÷µsP 0.05。ƒV ü Ï} ç/, Ù –®Ñ ÿ¥C¼ ìMȝ q ¯ï  6 t ],Œ ÃÜ ÿ¥CKM1 ,®Ñ ÿ 4ÚC¼ ì § s HW2℃¥ Ï} ç ï。É ù®ÑöÁ s Ís³[7] 。®m1 V[A,ÐCKM1 ,‚]ñ¥®Ñ ÿ PC¼ ì¥ s Íc A÷†®。 Ûª¥ Ï}ç ØÏ, Ù – îµ¥ ØC¼ ì s Íc  Û Ï} ç¥É›7ï/† t ],Œ®Ñ ÿ¥ Ø,C¼ ì s Íc /†¥÷ y,ƒV ü4Ú s ÍZ ë,®Ñ ÿ‚ 4Ú ¹C¼ì Ï} ç/ s Í¥s³,Q7µF  s³¥ t ]。m1 ®Ñ ÿ Ï} ç/C¼ ìMȝ q„ s Íc ¥•YFig.1 Effect of cold-hardeningon electricalconductivityand the chlorophyll contentsof muskmelon seedlingunder low temperaturestress·169·1 ù Ùy ü©®Ñ ÿ Ï} ç/C¼ ì FÄ ½ŸÐÉ iŸ¥•Ym2 ®Ñ ÿ Ï} ç/C¼ ìSOD„PODŸ¥•YFig.2 Effect of cold-hardeningonSOD and POD contentsof muskmelonseedlingunder low temperature stress2.2 ®Ñ ÿ Ï} ç/C¼ ìSOD„PODŸ¥•YSOD、POD© ±þ «VÄ¥ ¹½[8] 。®m2 V©,ÐCKM1 ,‚]ñ¥®Ñ ÿVñÏ,C¼ ì¥ Õ ¹ ½Ÿ ¤žA÷9 P 0.01。 Ûª2℃¥ Ï}ç/, Ù –Ü®Ñ ÿ¥T1 、T2 Ø¥ ½Ÿïïv/† t ],ŒSOD 、POD¥ŸA÷Ú¿ÃÜ®Ñ ÿ¥CKP 0.01。ƒV üC¼ ìÜV10 d®Ñ ÿª P8 ]ÞŸ  ðVÄþ1®¥ÅT¨,9  Ï} çÌ⥠a‹ ï。VmÏÎ V[ A,T2 Ø¥®Ñ ÿrTª¿T1 Ø。m3 ®Ñ ÿ Ï} ç/C¼ ìd „c ¥•YFig.3 Effect of cold-hardening on MDA content ofmuskmelon seedlingunder lowtemperaturestress2.3 ®Ñ ÿ Ï} ç/C¼ ìMDAc ¥•YMDA «VÄT¨¥KÔÁþ, “d s]¥1S½[9] 。®m3 V[ A,ÐCKM1 ,10 d®Ñ ÿ PC¼ ì ËMDAc A÷ 6ÚP 0.01,Œ  Ûª2℃¥ Ï} çHq/,®Ñ ÿ¥C¼ ì ËMDAc  Ù –B°ï  6 t ],ŒA÷®¿ÃÜ®Ñ ÿ¥CKP 0.01。ƒV ü10 d¥®Ñ ÿ Ù –ö„ C¼ ì ËBçñ¥ «VÄ,Œ 9  Ï} ç¥ a‹ ï。3 结论与讨论V[ s V[ A,‚]ñ®Ñ ÿC¼ ì s Í Àµ ¹T¨,Q7F  s³,P  Ûª2 ℃ Ï} ç/¥c  üA†®。 Û“Ï} ç HW¥üÉ,C¼ ìSOD、PODc  ï/† t ],MDAc „Mȝ q5ï  6t ]。Œ ÐÃÜ ÿ¥CKM1 ,‚]ñ®Ñ ÿ A÷]Å Ï} ç/C¼ ì ¹ ½¥s³[MDA„Mȝ q¥  6。 s Í¥s³±é 3Éâ Ù – µ“v¥µ ë•Y,Œ ;† ï Ž/†µ€ÉB„ùî。7 ¹ ½s³„MDAÐMȝ q  6¥]Å5Bçñ h  Ï]C¼ ì¥ åÊT¨。 iŸ„ s Íc û ™ ±é 3
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ï 。ùîV ü, Iâϱé iŸ„ s Íc  Ô‚ 濱é 3Éâ¥Z_Z[ 6,7] 。ùî ª¹10 d®Ñ ÿ A÷]ÅC¼ ì iŸ Ûª Ï} çÌâÏ¥9v,Œ®Ñ ÿ s Í µBç¥ åÊT¨,yN†V s Íc Z ëƒ,®Ñ ÿC±é µ‚ ¥•Y。Œ ®Ñ ÿ A÷4ÚC¼ ìSOD、PODŸ,]ÅC¼ ì ËÏ·170·  j  Ð  16 MDA¥ 3î„Mȝ q¥  6。7SOD、POD®Ñ} ç/±é FeŸµ¥T¨[1,2,6～ 10] ,MDA «VÄ¥ö1Áþ, cÐMȝ qQ˜“É ¥ å ñ[11] 。yN,Vƒt·S¥MÄ f ƒ Ÿ A,®Ñ ÿ †®C¼ ì±é®Ñ¥ ùËŸ, P±é FeŸ¤ž4Ú。 6“,VPOD©Ÿ¥MÄ Ÿ A,æ‚]®Ñ ÿC¼ ì FeŸ ¥4Úñ‚],7† Ø®Ñ ÿ¥F†¶€ÉB„ùî。• IÓD[1] ìÖ ¼,Š1Ú,¦ ,©.®Ñ Ð;} ç©ÕCQ¤ìÐ1ô ì tþÉc ¥•Y[ J] . öê jvÐÐ1 – SÐñ,2005,36167～ 69.[2] É¡,Ú .®Ñ} çCQ¤ ì F I 3 Ø·S¥ùî[ J] .Zó\,2006,123～ 24.[3] e 7î, Siž, Ù¡,©. aR®Ñ ÿ4Ú Ï ù˱þÖ Ü„I N¥ F ÏŸ  3 Ø[ J] .TþÐ, 2005,3108971～ 976.[4] Ù† 3.±þ 3 Ø 3Ä Lð Ø„/ Œ[ M] .ØÚ©âñ,2000.164～ 165,167～ 169,260～ 261,261～ 263.[ 5] Ù¤m,R,ôZ ,©.Ö Ü s Íc ©çZEùî[ J] .ÏS jÐY,2005, 6153～ 155.[ 6] ·
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