Salt tolerance of seven genotypes of zoysiagrass(Zoysia spp.)  

作　　者：Triston Hooks Joseph Masabni Girisha Ganjegunte Ling Sun Ambika Chandra Genhua Niu 

机构地区：[1]Texas A&M AgriLife Research and Extension Center,17360 Coit Rd,Dallas,TX 75252,USA [2]Biosystems Engineering Department,University of Arizona,1951 E.Roger Road,Tucson,AZ 85719,USA [3]Texas A&M AgriLife Research,1380 A&M Circle,El Paso,TX 79927,USA [4]Department of Agriculture,Collin College,391 Country Club Road,Wylie,TX 75098,USA

出　　处：《Technology in Horticulture》2022年第1期68-74,共7页园艺技术（英文）

基　　金：Funding for this project is provided by USDA NIFA to Project No.2017-68007-26318;through the Agriculture and Food Research Initiative,Water for Agricultural Challenge Area,and hatch project TEX07726.

摘　　要：Seven zoysiagrass genotypes were evaluated for salt tolerance in a greenhouse study.The plant materials included Zoysia matrella'Diamond',Z.japonica'Palisades',three Z.matrella×Z.japonica hybrids DALZ 1701,DALZ 1713,and'Innovation',and two Z.minima×Z.matrella hybrids(DALZ 1309 and'Lazer').Treatments included a control(nutrient solution)and two saline treatments representing moderate and high salt levels.The electrical conductivity(EC)was 1.3 dS m−1 for control and moderate(EC5)and high salinity(EC10)were 5.0 and 10.0 dS m−1,respectively.At the end of eight-weeks of treatment,the relative(percent control)shoot dry weight(DW)was greatest in'Diamond'in EC10,and the relative root DW was greatest in DALZ 1309 in EC5.A cluster analysis based on the relative tissue dry weight identified'Diamond',DALZ 1309,and DALZ 1713 as the most salt tolerant genotypes.Additionally,the green leaf area(GLA)index of'Diamond'and DALZ 1713 were 98.8%and 100%,respectively,indicating excellent visual appearance under high salt levels.Bi-weekly clipping DW showed that'Diamond'continued to produce biomass throughout the duration of the study under the EC10 treatment.Sodium(Na^(+))and chloride(Cl−)content in the shoot tissue of the seven turfgrass genotypes indicated that lower concentrations corresponded to greater salt tolerance indicating exclusion of Na+and Cl−from the shoot tissue.Taken together,the genotypes'Diamond'and DALZ 1713 were determined to be the most salt tolerant and recommended for use in areas with high soil or water salinity.

关 键 词：representing continued DIAMOND 

分 类 号：Q945[生物学—植物学]