Piao, Shunji

Wen, Liujun

Xu, Jia

Yi, Jin

Zhang, Hao

English

University of Kentucky

University of Kentucky UKnowledge International Grassland Congress Proceedings XXI International Grassland Congress / VIII International Rangeland Congress Studies on the Salt Tolerance Compensatory Growth Characteristics of Elytrigia elongata Liujun Wen Inner Mongolia Agricultural University, China Jin Yi Inner Mongolia Agricultural University, China Shunji Piao Inner Mongolia University, China Hao Zhang Inner Mongolia Agricultural University, China Jia Xu Inner Mongolia Agricultural University, China Follow this and additional works at: https://uknowledge.uky.edu/igc  Part of the Plant Sciences Commons, and the Soil Science Commons This document is available at https://uknowledge.uky.edu/igc/21/13-2/14 The XXI International Grassland Congress / VIII International Rangeland Congress took place in Hohhot, China from June 29 through July 5, 2008. Proceedings edited by Organizing Committee of 2008 IGC/IRC Conference Published by Guangdong People's Publishing House This Event is brought to you for free and open access by the Plant and Soil Sciences at UKnowledge. It has been accepted for inclusion in International Grassland Congress Proceedings by an authorized administrator of UKnowledge. For more information, please contact UKnowledge@lsv.uky.edu. 瞯 ]502　 瞯 　 Multifunctional Grasslands in a Changing World 　 Volume Ⅱ 　Grasslands/Rangelands Production Systems——— Domestication of Native Grasslands/Rangelands Plants for Regional UseStudies on the salt tolerance compensatory growth characteristics of Elytrigia elongataWen L iuj un 1 ,2 , Y i Jin1 ，Piao Shunj i2 ，Zhang H ao1 , X u Jia11 Inner Mongolia A gric .Univ . , Hohhot , Inner Mongolia 010019 China E‐mail : y i j in＠ 163 .com 2 Inner Mongolia UniversityKey words : Ely trigia elongata ,seed , seedling vigor , salt tolerance , compensatory grow thIntroduction Elytrigia elongata ( Host) Nevski is a species with high tolerance to salt . Former researchers showed that therewas salt tolerance compensatory grow th ( STCG) characteristics in this species , but the STCG range and the limits have notbeen defined . The purpose of this experiment is to determine the differences of STCG character between varieties of thespecies , Alker and Tyrell , under mono‐salt stress and complex‐salts stresses . The study on it is of great importance forevaluating and selecting salt tolerant plant materials .Materials and methods The test materials were seeds of the Alker and Tyrell varieties of Elytrigia elongata . The seeds weredipped in the mono‐salt ( NaCl) and complex‐salts ( NaCl７１％ ,CaCl２ ３％ ,MgSO４ ４％ ,K２ SO４ ２２％ , based on the salt componentof Yellow River irrigated farmland in Inner Mongolia ) solution of different concentration for ２４h . Each treatment had ４repetition , each contained ５０ seeds . The concentration of both salt solutions ranged ０ .０％ ‐２ .０％ , the gradient interval was０畅２％ .The germination test was conducted with natural lighting at １５ ℃ .The germination percentage and length of seedlingwere measured after １５ days , and then we calculated germinating index ( GI) and vitality index ( VI) . The salt concentrationrange , in which the seeds�VI was higher than the seeds�VI at ０ .０％ salt concentration , was the STCG range of the plant . Thehighest salt concentration in this range was the STCG point .Results Figure １ shows the results of the test with mono‐salt stress . Both of the materials showed the STCG . The Alker摧s pointof the STCG was at ０ .８％ , and the Tyrell摧s was at ０ .２％ .The range of the STCG of two varieties was from ０ .２％ to ２ .０％ .The STCG was not obvious when the salt concentration was above １ .０％ . Figure２ shows the results of the test under complex‐salt stress . Alker didn�t show the STCG . The STCG of Tyrell was not obvious , and the point was at ０ .６％ .The STCG of twovarieties under complex‐salts stress was not as obvious as that under mono‐salt stress .Figure 1 Curves o f the seeds摧 V I o f two varieties under Mono‐salt stress .Figure 2 Curves o f the seeds摧 V I o f two varieties under comp lex‐salts stress .Conclusions The results showed that the character of STCG of two varieties was more distinct under mono‐salt stress than thatunder complex‐salts stress . There were differences on the characteristic of STCG between the two varieties . The point ofSTCG of Alker was higher than the point of Tyrell with mono‐salt stress . The character of STCG of Tyrell was more distinctthan that of Alker with complex‐salt stress .ReferencesLin Q .F . , ２００４ . Study on the salt‐tolerant plants . Bei j ing : Science Press .Bai Y .E . , Yi J . , etc . , ２００５ . Studies on salt tolerance of seeds of ８ rhizomatous grasses . Grassland o f China Vol . ２７ ,５５‐６０ .

Studies on the Salt Tolerance Compensatory Growth Characteristics of \u3ci\u3eElytrigia elongata\u3c/i\u3e

https://uknowledge.uky.edu/cgi/viewcontent.cgi?article=3458&amp;context=igc

Studies on the Salt Tolerance Compensatory Growth Characteristics of \u3ci\u3eElytrigia elongata\u3c/i\u3e

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