首页|两株耐盐碱大豆根瘤菌的分离及鉴定

两株耐盐碱大豆根瘤菌的分离及鉴定

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为筛选适宜盐碱地条件下应用的根瘤菌菌株,本研究选择安达市采取土样,以大豆品种满仓金和绥农 53 作为宿主,对根瘤菌进行分离与纯化,筛选出两株具有典型根瘤菌表型特征的菌株,随后,对这些菌株进行16S rDNA测序分析,最终成功分离出2 个根瘤菌菌株,并将它们命名为an28 和an44。分别在各自捕获宿主上进行结瘤试验,来确定an28 和an44 的结瘤特征。抗生素抗性鉴定结果表明,an44 对浓度20 μg·mL-1的红霉素(ERY)和浓度100 μg·mL-1的羧苄青霉素(CAR)具有抗性,an28 对浓度50 μg·mL-1 的ERY具有抗性。耐盐性鉴定结果表明,an28 可以在NaCl浓度为600 mmol·L-1的TY固体培养基上正常生长;而an44 最高只能在NaCl浓度为200 mmol·L-1 时生长。耐碱性鉴定结果表明,an28 可以在pH11。9 的TY固体培养基上正常生长,而an44 的碱性生长环境只能达到pH9。9。然后又分别在8 种耐盐碱大豆种质(庆特4 号、铁丰8 号、牛眼睛、黑珍珠、齐农5 号、合丰 50、黑河 49 和黑农 531)和 2 份不耐盐碱大豆品种(锦农5 号和双宝8 号)上分别接种2 株根瘤菌进行结瘤鉴定,结果表明接种根瘤菌an28 和an44 在10 个大豆种质上的结瘤数目变化范围分别为2。00~8。67 和5。67~35。67 个·株-1。
Isolation and Identification of Two Strains of Saline-tolerant Soybean Rhizobium
In order to screen suitable rhizobia strains for application under saline alkali soil conditions,this study selected soil samples from Anda City and used soybean varieties Mancangjin and Suinong 53 as hosts to isolate and purify rhizobia.Two strains with typical rhizobia phenotype characteristics were screened.Subsequently,16S rDNA sequencing analysis was performed on these strains,and two rhizobia strains were successfully isolated,named an28 and an44.Perform nodulation experiments on each captured host to determine the nodulation characteristics of an28 and an44.The results of antibiotic resistance identification showed that an44 was resistant to erythromycin(ERY)at a concentration of 20 μg·mL-1 and carbenicillin(CAR)at a concentration of 100 μg·mL-1,while an28 was resistant to ERY at a concentration of 50 μg·mL-1.The salt tolerance identification results showed that an28 can grow normally on TY solid culture medium with a NaCl concentration of 600 mmol·L-1;And an44 can only grow at a maximum NaCl concentration of 200 mmol·L-1.The results of alkali resistance identification indicate that an28 can grow normally on TY solid culture medium at pH11.9,while the alkaline growth environment of an44 can only reach pH9.9.Then,two strains of rhizobia were inoculated on eight salt alkali tolerant soybean germplasms(Qingte 4,Tiefeng 8,Niuyanjing,Heizhenzhu,Qinong 5,Hefeng 50,Heihe 49,and Heinong 531)and two salt alkali tolerant soybean varieties(Jinnong 5 and Shuangbao 8)for nodulation identification.The results showed that the range of nodulation numbers for inoculating rhizobia an28 and an44 on 10 soybean germplasms was 2.00-8.67 and 5.67-35.67 per plant,respectively.

soybeanrhizobiumisolation and identificationsaline-alkali tolerancere-inoculation and identification

耿思琦、王洁琦、魏煊格、李国、徐存尧、韩德志、袁明、杜吉到

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黑龙江八一农垦大学 农学院,黑龙江大庆 163319

黑龙江省盐碱地改良工程技术研究中心,黑龙江 大庆 163319

黑龙江省农业科学院黑河分院,黑龙江 黑河 164300

黑龙江省农业科学院 齐齐哈尔分院,黑龙江 齐齐哈尔 161006

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大豆 根瘤菌 分离与鉴定 耐盐碱 回接鉴定

黑龙江省"双一流"新一轮建设学科协同创新成果建设项目黑龙江八一农垦大学"三纵科研支持计划"-青创人才黑龙江八一农垦大学市校融合项目黑龙江八一农垦大学研究生创新科研项目

LJGXCG2022-111ZRCQC202301SXRH2022-03YJSCX2022-Y03

2024

大豆科学
黑龙江省农业科学院

大豆科学

CSTPCD北大核心
影响因子:0.641
ISSN:1000-9841
年,卷(期):2024.43(4)
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