黑龙江农业科学
黑龍江農業科學
흑룡강농업과학
HEILONGJINAG AGRICULTURAL SCIENCE
2012年
7期
69-72
,共4页
张磊%孙慧颖%高荣%刘仁静%岳桦
張磊%孫慧穎%高榮%劉仁靜%嶽樺
장뢰%손혜영%고영%류인정%악화
大叶铁线莲%PEG胁迫%叶面积%叶片绝对含水量%根系活力
大葉鐵線蓮%PEG脅迫%葉麵積%葉片絕對含水量%根繫活力
대협철선련%PEG협박%협면적%협편절대함수량%근계활력
Clematis heracleifolia%PEG stress%leaf area%absolute water content%root vigor
大叶铁线莲具有耐旱植物特征,根系长达60cm以上。为研究其是否能够在大庆草原沙土干旱生境应用于园林绿化,选择大叶铁线莲一年生实生苗为试材,以30%、50%、70%浓度的PEG溶液人工模拟干旱渗透胁迫,测定其在不同干旱胁迫下,叶面积、叶片含水量、根系活力的变化。结果表明：大叶铁线莲的叶面积和叶片的绝对含水量与PEG的浓度及PEG的处理时间呈负相关：其中以30%PEG处理12h叶片开始出现皱缩,叶面积减少16.67%;50%PEG处理8h减少21.69%;70%PEG处理4h减少34.00%。根系活力与PEG的浓度及PEG的处理时间呈负相关,胁迫28h,30%、50%、70%PEG处理的根系活力分别下降53.36%、72.25%和81.62%。大叶铁线莲在不同干旱胁迫下具有一定的抗旱能力,30%PEG胁迫20h以内,70%植株能恢复,PEG对恢复后的植株仍有伤害,表现为形态不正常,但能长出新叶;50%PEG胁迫16h以内,65%植株能恢复;70%PEG胁迫12h植株就失去生命活力。复水28h后,30%、50%PEG根系活力各恢复44%和14%;70%PEG处理的根系活力没有恢复。
大葉鐵線蓮具有耐旱植物特徵,根繫長達60cm以上。為研究其是否能夠在大慶草原沙土榦旱生境應用于園林綠化,選擇大葉鐵線蓮一年生實生苗為試材,以30%、50%、70%濃度的PEG溶液人工模擬榦旱滲透脅迫,測定其在不同榦旱脅迫下,葉麵積、葉片含水量、根繫活力的變化。結果錶明：大葉鐵線蓮的葉麵積和葉片的絕對含水量與PEG的濃度及PEG的處理時間呈負相關：其中以30%PEG處理12h葉片開始齣現皺縮,葉麵積減少16.67%;50%PEG處理8h減少21.69%;70%PEG處理4h減少34.00%。根繫活力與PEG的濃度及PEG的處理時間呈負相關,脅迫28h,30%、50%、70%PEG處理的根繫活力分彆下降53.36%、72.25%和81.62%。大葉鐵線蓮在不同榦旱脅迫下具有一定的抗旱能力,30%PEG脅迫20h以內,70%植株能恢複,PEG對恢複後的植株仍有傷害,錶現為形態不正常,但能長齣新葉;50%PEG脅迫16h以內,65%植株能恢複;70%PEG脅迫12h植株就失去生命活力。複水28h後,30%、50%PEG根繫活力各恢複44%和14%;70%PEG處理的根繫活力沒有恢複。
대협철선련구유내한식물특정,근계장체60cm이상。위연구기시부능구재대경초원사토간한생경응용우완림녹화,선택대협철선련일년생실생묘위시재,이30%、50%、70%농도적PEG용액인공모의간한삼투협박,측정기재불동간한협박하,협면적、협편함수량、근계활력적변화。결과표명：대협철선련적협면적화협편적절대함수량여PEG적농도급PEG적처리시간정부상관：기중이30%PEG처리12h협편개시출현추축,협면적감소16.67%;50%PEG처리8h감소21.69%;70%PEG처리4h감소34.00%。근계활력여PEG적농도급PEG적처리시간정부상관,협박28h,30%、50%、70%PEG처리적근계활력분별하강53.36%、72.25%화81.62%。대협철선련재불동간한협박하구유일정적항한능력,30%PEG협박20h이내,70%식주능회복,PEG대회복후적식주잉유상해,표현위형태불정상,단능장출신협;50%PEG협박16h이내,65%식주능회복;70%PEG협박12h식주취실거생명활력。복수28h후,30%、50%PEG근계활력각회복44%화14%;70%PEG처리적근계활력몰유회복。
Clematis heracleifolia has drought-tolerant plants characteristics with the root over 60 cm.For the purpose of studying whether it could be used for landscaping in area of drought sand habitat like Daqing grassland,one-year Clematis heracleifolia was chosen as test materials and 30%,50%,70% PEG simulation drought osmotic stress were used to determine the leaf area,leaf water content,root vigor changes under different drought stress.The results showed that：the leaf area and leaf water content of Clematis heracleifolia had negative correlation with the concentration of the PEG and PEG processing time：30% PEG processing 12 h,leaves began to appear shrink,leaf area reducing 16.67%;50% PEG processing 8 h reduce 21.69%,and 70% PEG processing 4 h reduced by 34.00%.Root vigor has negative correlation with the concentration of the PEG and PEG processing time.Stressing 28 h,root activity of 30%,50%,70% PEG processing were reduced by 53.36%,72.25%,81.62%.Clematis heracleifolia had certain ability of fighting drought in stress：30% PEG stressing within 20 h,70% plant could resume,but PEG still hurt the restoration of the plant,for the performance of the form of the Clematis heracleifolia was not normal,but Clematis heracleifolia could leaf out;50% PEG stressing within 16 h,65% plant could restore;70% PEG stressing 12 h,plant lost life energy.After watering 28 h,30%,50% PEG root activity each restoration 44% and 14%,70% PEG root vigor had not restored.
