浙江农业学报 ›› 2023, Vol. 35 ›› Issue (7): 1662-1671.DOI: 10.3969/j.issn.1004-1524.20221161
候彩霞1,2(), 丁德东1,2, 何静1,2,*(
), 赵吉桃1,2, 李彦湘1,2, 赵倩1,2, 张崇庆1,2, 李南1,2
收稿日期:
2022-08-11
出版日期:
2023-07-25
发布日期:
2023-08-17
通讯作者:
*何静,E-mail:hejing268@aliyun.com
基金资助:
HOU Caixia1,2(), DING Dedong1,2, HE Jing1,2,*(
), ZHAO Jitao1,2, LI Yanxiang1,2, ZHAO Qian1,2, ZHANG Chongqing1,2, LI Nan1,2
Received:
2022-08-11
Online:
2023-07-25
Published:
2023-08-17
Contact:
HE Jing
摘要:
为筛选对枸杞根腐病主要致病菌Fusarium solani具有明显抑制效果的生防菌株,通过组织分离法从健康枸杞植株中分离内生真菌,用平板对峙法筛选拮抗菌株,结合形态特征和分子生物学鉴定明确其分类地位;分别采用菌丝生长速率法和悬滴法比较不同培养液处理的内生真菌对F. solani菌丝生长和孢子萌发的影响,通过盆栽试验验证其生防效果。结果表明,在分离得到的106株内生真菌中,筛选获得1株对F. Solani具有明显抑制效果的拮抗菌株,编号YBG8,经鉴定其为链格孢菌(Alternaria alternata);YBG8原液体积分数为20%时,对F. solani菌丝生长抑制率最强,达70.49%,且具有浓度依赖性;YBG8滤液体积分数50%时,对F. solani孢子萌发抑制率最大,达82.4%;盆栽试验结果显示,先接种A. alternata再接种F. solani,可有效降低枸杞根腐病的发病率,其相对防效可达50%。研究结果可以为有效利用内生真菌防治枸杞根腐病提供理论依据。
中图分类号:
候彩霞, 丁德东, 何静, 赵吉桃, 李彦湘, 赵倩, 张崇庆, 李南. 枸杞内生真菌的筛选、鉴定及其生防作用[J]. 浙江农业学报, 2023, 35(7): 1662-1671.
HOU Caixia, DING Dedong, HE Jing, ZHAO Jitao, LI Yanxiang, ZHAO Qian, ZHANG Chongqing, LI Nan. Screening, identification and biocontrol effect of endophytic fungus from Lycium barbarum[J]. Acta Agriculturae Zhejiangensis, 2023, 35(7): 1662-1671.
图2 五株拮抗菌株对F. solani的抑菌率 数据为平均值±标准误,柱上无相同小写字母表示差异显著(P<0.05)。
Fig.2 Inhibition rate of 5 antagonistic strains to F. solani Data ($\bar{x}$±s) on the bars marked without the same lowercase letter indicated significant differences at P<0.05.
图3 YBG8菌株的形态特征 A,培养3 d YBG8菌落形态正面;B,培养3 d YBG8菌落形态背面;C,培养7 d YBG8菌落形态正面;D,培养7 d YBG8菌落形态背面;E、F分别为YBG8菌丝和孢子形态。
Fig.3 Morphological characteristics of YBG8 strain A, The front of YBG8 colony morphology cultured for 3 days; B, The back of YBG8 colony morphology cultured for 3 days; C, The front of YBG8 colony morphology cultured for 7 days; D, The back of YBG8 colony morphology cultured for 7 days; E and F, Mycelia and spore morphology of YBG8.
体积分数 Volume fraction/% | 对F. solani的抑制率 Inhibition rate on F. Solani mycelia | ||
---|---|---|---|
培养原液 Culture solution | 培养滤液 Filtrate solution | 失活液 Inactivated solution | |
1.25 | 31.40±0.44 | 0.91±0.54 | 0.13±0.01 |
2.50 | 34.54±0.28 | 3.01±0.54 | 0.12±0.01 |
5 | 37.04±0.58 | 4.34±0.61 | 0.11±0.01 |
10 | 49.54±0.17 | 8.22±0.85 | 0.10±0.01 |
20 | 70.49±0.63 | 18.75±0.73 | 0.10±0.01 |
表1 YBG8菌株培养原液、滤液和失活液对F. solani菌丝的抑制率
Table 1 Inhibition rate of culture solution, filtrate solution and inactivated solution of YBG8 on F. Solani mycelia %
体积分数 Volume fraction/% | 对F. solani的抑制率 Inhibition rate on F. Solani mycelia | ||
---|---|---|---|
培养原液 Culture solution | 培养滤液 Filtrate solution | 失活液 Inactivated solution | |
1.25 | 31.40±0.44 | 0.91±0.54 | 0.13±0.01 |
2.50 | 34.54±0.28 | 3.01±0.54 | 0.12±0.01 |
5 | 37.04±0.58 | 4.34±0.61 | 0.11±0.01 |
10 | 49.54±0.17 | 8.22±0.85 | 0.10±0.01 |
20 | 70.49±0.63 | 18.75±0.73 | 0.10±0.01 |
图6 YBG8菌株对枸杞根腐病的防效 A,F. solani;B,对照;C,YBG8;D,接种YBG8菌株 7 d后接种F. solani。
Fig.6 Control effect of YBG8 strain on L.barbarum root rot A, F. solani; B, Control; C, YBG8; D, After 7 days of inoculation with YBG8 strain, F. solani was inoculated.
处理 Treatment | 发病率 Morbidity | 病情指数 Disease index | 相对防效 Relative control effect |
---|---|---|---|
CK | 50.0 | 40.0 | |
YBG8 | 40.0 | 36.0 | 38.8 |
YBG8+F. solani | 30.0 | 30.0 | 50.0 |
F. solani | 70.0 | 60.0 | -40 |
精甲·咯·嘧菌 | 20 | 20 | 66.7 |
Metalaxyl-M·fludioxonil· azoxystrobin |
表2 菌株YBG8培养液对枸杞根腐病的防治效果
Table 2 Control effect of culture solution of YBG8 strain on wolfberry root rot %
处理 Treatment | 发病率 Morbidity | 病情指数 Disease index | 相对防效 Relative control effect |
---|---|---|---|
CK | 50.0 | 40.0 | |
YBG8 | 40.0 | 36.0 | 38.8 |
YBG8+F. solani | 30.0 | 30.0 | 50.0 |
F. solani | 70.0 | 60.0 | -40 |
精甲·咯·嘧菌 | 20 | 20 | 66.7 |
Metalaxyl-M·fludioxonil· azoxystrobin |
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