东北林业大学学报
東北林業大學學報
동북임업대학학보
JOURNAL OF NORTHEAST FORESTRY UNIVERSITY
2014年
11期
14-16,27
,共4页
干旱胁迫%生理生化特性%火棘
榦旱脅迫%生理生化特性%火棘
간한협박%생리생화특성%화극
Drought stress%Physiological and biochemical characteristics%Pyracantha fortuneana seedlings
以0．5 a火棘实生幼苗为试材，采用盆栽称质量控水法，研究了土壤相对含水量75％（ CK，对照）、55％（ LS，轻度干旱）、35％（ MS，中度干旱）、15％（ HS，重度干旱）4种不同强度干旱胁迫对其叶片生理生化特性的影响。结果表明：随着干旱胁迫强度的加大，火棘幼苗叶绿素质量分数呈现出下降趋势，其中LS胁迫下与 CK差异不显著，MS、HS胁迫下与CK差异显著；可溶性糖与游离脯氨酸质量分数、相对电导率与丙二醛质量摩尔浓度均呈现出增加趋势，其中LS胁迫下除游离脯氨酸质量分数与CK差异显著外，其余均与CK差异不显著，而MS、HS胁迫下4种指标均与CK差异显著；过氧化物酶（ POD）和超氧化物歧化酶（ SOD）活性呈现出先增强后减弱的变化趋势，其中LS、MS胁迫下的活性显著强于CK的，在HS胁迫下又显著弱于CK 的。结果认为火棘幼苗对干旱胁迫表现出一定的抗旱耐旱潜力。
以0．5 a火棘實生幼苗為試材，採用盆栽稱質量控水法，研究瞭土壤相對含水量75％（ CK，對照）、55％（ LS，輕度榦旱）、35％（ MS，中度榦旱）、15％（ HS，重度榦旱）4種不同彊度榦旱脅迫對其葉片生理生化特性的影響。結果錶明：隨著榦旱脅迫彊度的加大，火棘幼苗葉綠素質量分數呈現齣下降趨勢，其中LS脅迫下與 CK差異不顯著，MS、HS脅迫下與CK差異顯著；可溶性糖與遊離脯氨痠質量分數、相對電導率與丙二醛質量摩爾濃度均呈現齣增加趨勢，其中LS脅迫下除遊離脯氨痠質量分數與CK差異顯著外，其餘均與CK差異不顯著，而MS、HS脅迫下4種指標均與CK差異顯著；過氧化物酶（ POD）和超氧化物歧化酶（ SOD）活性呈現齣先增彊後減弱的變化趨勢，其中LS、MS脅迫下的活性顯著彊于CK的，在HS脅迫下又顯著弱于CK 的。結果認為火棘幼苗對榦旱脅迫錶現齣一定的抗旱耐旱潛力。
이0．5 a화극실생유묘위시재，채용분재칭질량공수법，연구료토양상대함수량75％（ CK，대조）、55％（ LS，경도간한）、35％（ MS，중도간한）、15％（ HS，중도간한）4충불동강도간한협박대기협편생리생화특성적영향。결과표명：수착간한협박강도적가대，화극유묘협록소질량분수정현출하강추세，기중LS협박하여 CK차이불현저，MS、HS협박하여CK차이현저；가용성당여유리포안산질량분수、상대전도솔여병이철질량마이농도균정현출증가추세，기중LS협박하제유리포안산질량분수여CK차이현저외，기여균여CK차이불현저，이MS、HS협박하4충지표균여CK차이현저；과양화물매（ POD）화초양화물기화매（ SOD）활성정현출선증강후감약적변화추세，기중LS、MS협박하적활성현저강우CK적，재HS협박하우현저약우CK 적。결과인위화극유묘대간한협박표현출일정적항한내한잠력。
With 0.5-year-old seedlings of Pyracantha fortuneana, we used pot weighing controlling water to study the relative wa-ter content of soils including 75%(CK, contrast), 55%(LS, the mild drought), 35%(MS, moderate drought), 15%( HS, severe droughts) , and the effects of four different drought stress intensity on its leaf physiological and biochemical characteristics.With the increase of drought stress intensity, the contents of P.fortuneana seedlings chlorophyll present a downward trend, under which the LS stress showed no significant difference with CK, but the HS and MS stress showed significant difference.Soluble sugar and free proline content, relative conductivity and malondialdehyde content presented a trend of increase, under which the LS stress in addition to the free proline content and CK significant difference, and for the rest there were no significant differences with CK, but four indexes under the MS and HS stress have remarkable differences with CK.Peroxidase (POD) and superoxide dismutase (SOD) activity showed enhancing first and then changed into weake-ning, and under LS and MS stress SOD was significantly better than CK, while under HS stress it was significantly weaker than CK.Therefore, the firethorn seedlings showed certain potential in the drought-resistant tolerance to drought stress.
