草业学报
草業學報
초업학보
Acta Prataculturae Sinica
2015年
11期
240-246
,共7页
丁效东%张士荣%刘阳超%冯固
丁效東%張士榮%劉暘超%馮固
정효동%장사영%류양초%풍고
梭梭%囊果碱蓬%白梭梭%耐干旱脱水%存活率
梭梭%囊果堿蓬%白梭梭%耐榦旱脫水%存活率
사사%낭과감봉%백사사%내간한탈수%존활솔
Haloxylon ammodendron%Suaeda physophora%psammophyte Haloxylon persicum%desiccation-tolerant%survival rate
本文以沙生植物白梭梭幼苗为对照,研究了盐生植物梭梭和囊果碱蓬幼苗的耐干旱脱水能力,通过比较干旱时间对三者幼苗干旱后存活率的影响,评价其耐脱水能力,并对复水后根部细胞的受损情况进行了研究。结果表明:根长为1~2 cm 白梭梭幼苗经过7,14,21和28 d 干旱后,存活率没有显著性差异,但是梭梭和囊果碱蓬随着干旱时间的延长,存活率发生显著性地降低,囊果碱蓬幼苗干旱28 d 后全部死亡并发生降解;白梭梭幼苗的耐干旱能力比较强,干旱28 d 后复水根部死亡细胞和受伤的细胞比较少,而梭梭死亡和受损程度明显比白梭梭高;300 mmol /L NaCl 溶液处理,梭梭的根尖发生弯曲,根尖大部分死亡。研究表明,白梭梭、梭梭和囊果碱蓬属于“同型叶绿素型”植物,在光照下干旱叶绿体不会被降解,其幼苗在干旱和复水过程中能够适应干旱环境。
本文以沙生植物白梭梭幼苗為對照,研究瞭鹽生植物梭梭和囊果堿蓬幼苗的耐榦旱脫水能力,通過比較榦旱時間對三者幼苗榦旱後存活率的影響,評價其耐脫水能力,併對複水後根部細胞的受損情況進行瞭研究。結果錶明:根長為1~2 cm 白梭梭幼苗經過7,14,21和28 d 榦旱後,存活率沒有顯著性差異,但是梭梭和囊果堿蓬隨著榦旱時間的延長,存活率髮生顯著性地降低,囊果堿蓬幼苗榦旱28 d 後全部死亡併髮生降解;白梭梭幼苗的耐榦旱能力比較彊,榦旱28 d 後複水根部死亡細胞和受傷的細胞比較少,而梭梭死亡和受損程度明顯比白梭梭高;300 mmol /L NaCl 溶液處理,梭梭的根尖髮生彎麯,根尖大部分死亡。研究錶明,白梭梭、梭梭和囊果堿蓬屬于“同型葉綠素型”植物,在光照下榦旱葉綠體不會被降解,其幼苗在榦旱和複水過程中能夠適應榦旱環境。
본문이사생식물백사사유묘위대조,연구료염생식물사사화낭과감봉유묘적내간한탈수능력,통과비교간한시간대삼자유묘간한후존활솔적영향,평개기내탈수능력,병대복수후근부세포적수손정황진행료연구。결과표명:근장위1~2 cm 백사사유묘경과7,14,21화28 d 간한후,존활솔몰유현저성차이,단시사사화낭과감봉수착간한시간적연장,존활솔발생현저성지강저,낭과감봉유묘간한28 d 후전부사망병발생강해;백사사유묘적내간한능력비교강,간한28 d 후복수근부사망세포화수상적세포비교소,이사사사망화수손정도명현비백사사고;300 mmol /L NaCl 용액처리,사사적근첨발생만곡,근첨대부분사망。연구표명,백사사、사사화낭과감봉속우“동형협록소형”식물,재광조하간한협록체불회피강해,기유묘재간한화복수과정중능구괄응간한배경。
The previous research has been concentrated on the dehydration resistance of the seedlings in the two halophytes:Haloxylon ammodendron and Suaeda physophora .Comparing with the psammophyte Haloxylon persicum,both the seedling survival rate and the root damage after the desiccation were investigated,the re-sults showed that:No significant difference was found in the survival rates of H .persicum among the 7,14, 21 and 28 days desiccation treatments,however,the survival rates of H .ammodendron and S .physophora has been significantly decreased with the desiccated duration,in which the seedlings of S .physophora were all died in the 28 days desiccation treatment.The seedling root of H .persicum was rarely damaged by the 28 days desiccation treatments,which was better than that in H .ammodendron,in the 300 mmol/L NaCl treatment, the root tip of the H .ammodendron seedlings were all bended and died.It was showed that H .persicum,H . ammodendron and S .physophora were all “homoiochlorophyllous”resurrection plants,they would not de-grade their chlorophyll during the desiccation time,and could survive fast when the water supplied again, which was an important adapt strategy to the extremely drought environment.