林业科学 ›› 2020, Vol. 56 ›› Issue (7): 70-81.doi: 10.11707/j.1001-7488.20200708
所属专题: 森林有害生物
李永丽1,王亚红1,周洲1,*,曲良建2
收稿日期:
2019-08-21
出版日期:
2020-07-25
发布日期:
2020-08-11
通讯作者:
周洲
基金资助:
Yongli Li1,Yahong Wang1,Zhou Zhou1,*,Liangjian Qu2
Received:
2019-08-21
Online:
2020-07-25
Published:
2020-08-11
Contact:
Zhou Zhou
摘要:
目的: 研究新疆野苹果内生链霉菌菌株A-m1的分类地位,优化其发酵条件,测定其对多种植物病原物的抑菌活性,明确其广谱抑菌性,为相关病害的生物防治以及该菌株的应用提供参考。方法: 对菌株A-m1菌落培养性状、形态特征、理化性质和16S rDNA序列进行研究;以葡萄座腔菌为靶标菌,确定最高抑菌活性所需的基础培养基,优化碳源和氮源种类,确定最优发酵条件;测定发酵滤液对9种供试植物病原菌的抑菌活性。结果: 菌株A-m1是娄彻氏链霉菌,命名为Streptomyces rochei A-m1。高抑菌活性所需基础培养基为高氏一号,最佳碳源为可溶性淀粉,最佳氮源为硝酸钾;添加培养基体积5%的种子液、发酵温度23~32℃之间、pH 6~8之间、装液量100/500 mL和发酵培养4天为较优的发酵条件。发酵滤液对参试的9株植物病原菌均表现出抑菌活性,具广谱抑菌性;其中对葡萄座腔菌、苹果拟茎点霉的抑菌率可达95%以上,对胶孢炭疽菌、小麦赤霉病菌和小麦纹枯病菌的抑菌率超过80%,表现出强抑菌作用。结论: 链霉菌S. rochei A-m1抑菌谱较广、抑菌活性高,具有防治部分作物真菌性病害的应用潜力。
中图分类号:
李永丽,王亚红,周洲,曲良建. 新疆野苹果内生娄彻氏链霉菌A-m1的鉴定和发酵条件优化及抑菌广谱作用[J]. 林业科学, 2020, 56(7): 70-81.
Yongli Li,Yahong Wang,Zhou Zhou,Liangjian Qu. Identification and Optimization of Fermentation Conditions and Antibacterial Activity of Endophytic Streptomyces rochei A-m1 from the Branch of Malus sieversii[J]. Scientia Silvae Sinicae, 2020, 56(7): 70-81.
表1
菌株A-m1在不同培养基上的形态特征"
培养基 Medium | 孢子堆颜色 Spore mass color | 气生菌丝颜色 Aerial mycelium | 基内菌丝颜色 Substrate mycelium | 可溶性色素 Soluble pigment | 菌落特征 Colony characteristics |
ISP2 | 棕色 Brown | 白色 White | 黄色 Yellow | 黄色 Yellow | 菌落中央凸起,边缘有白色放射状菌丝 The colony is convex in the center and has white radial hyphae on the edge |
ISP3 | 棕色 Brown | 白色 White | 无色 Colorless | 无色 Colorless | 菌落中央凸起,边缘有白色放射状菌丝,中间有黑色同心轮纹 The colony is convex in the center and has white radial hyphae on the edge, black concentric wheel pattern in the middle |
ISP4 | 紫色 Purple | 白色 White | 黄色 Yellow | 黄色 Yellow | 菌落中央凸起,边缘有不规则放射状菌丝 The colony is convex in the center and has irregular radial hyphae on the edge |
ISP5 | 棕色 Brown | 白色 White | 黄色 Yellow | 无色 Colorless | 菌落中央凸起,边缘有不规则放射状菌丝 The colony is convex in the center and has irregular radial hyphae on the edge |
LB | 无 None | 白色 White | 黄色 Yellow | 黄色 Yellow | 菌落圆形,表面有光泽,中央凸起,没有产孢 The colony is round, the surface is shiny, the central bulge, no sporulation |
NA | 白色 White | 白色 White | 黄色 Yellow | 黄色 Yellow | 菌落呈规则圆形,中央凹陷,边缘有白色放射状菌丝 The colonies are regular round, with a central depression and white radial hyphae at the edges |
PDA | 棕色 Brown | 白色 White | 黄色 Yellow | 黄色 Yellow | 菌落中央凸起,边缘有白色放射状菌丝 The colony is convex in the center and has white radial hyphae on the edge |
PSA | 紫色 Purple | 白色 White | 黄色 Yellow | 黄色 Yellow | 菌落中央黑色凸起,外围呈紫色,边缘有白色放射状菌丝 The colony is black in the center, purple in the periphery, and white radial hyphae at the edges |
高氏一号 Gause 1 | 淡紫色 Light purple | 白色 White | 黄色 Yellow | 黄色 Yellow | 菌落中央凸起,菌落呈紫色,有黑色同心轮纹,边缘是白色不规则放射状菌丝 The colony is convex in the center, the colony is purple, there are black concentric rings, and the edges are white irregular radial hyphae |
表3
菌株A-m1与近缘种之间生理生化特征对比①"
理化特征 Physiological and biochemical characteristics | 菌株 A-m1 | 娄彻氏链霉菌 S. rocheiD164 | 哥斯达黎加链霉菌 S. costaricanus | 鼠灰链霉菌 S. murinus | |
碳源利用 Utilization of carbon sources | 木糖Xylose | + | + | + | + |
棉子糖Raffinose | + | + | - | - | |
L-阿拉伯糖L-Arabinose | + | + | + | - | |
L-鼠李糖L-Rhamnose | + | + | - | - | |
果糖Fructose | + | + | + | + | |
葡萄糖Glucose | + | + | + | + | |
肌醇Inositol | - | - | - | - | |
蔗糖Sucrose | - | - | + | - | |
甘露醇Mannitol | + | + | + | + | |
水杨苷Salicin | + | + | + | + | |
牛奶凝固与胨化 Milk coagulation and peptonization | 凝固Coagulation | + | + | + | + |
胨化Peptonization | + | + | + | + | |
明胶液化Degradation of gelatin | - | NA | + | + | |
H2S产生H2S production | - | NA | - | - | |
黑色素形成Melanin formation | - | NA | - | - | |
纤维素分解Cellulose decomposition | + | + | - | + | |
淀粉水解Starch hydrolysis | + | + | + | + |
表2
菌株A-m1发酵滤液和2种农药对9种植物病原菌抑制作用"
菌株 Strain | 抑菌率Inhibition rate(%) | ||
发酵滤液 Fermentation filtrate | 70%甲基硫菌灵 70% thiophanate | 80%多菌灵 80% carbendazim | |
葡萄座腔菌 B. dothidea | 95.21±0.00 | 100.00±0.00 | 91.49±2.80 |
胶孢炭疽菌 C. gloeosporioides | 83.08±1.38 | 100.00±0.00 | 100.00±0.00 |
拟茎点霉 P. mali | 91.04±1.55 | 100.00±0.00 | 100.00±0.00 |
番茄灰霉病菌 B. cinerea | 77.60±3.67 | 50.67±1.22 | 4.27±2.06 |
南天竹炭疽病菌 C. karstii | 66.88±1.10 | 100.00±0.00 | 100.00±0.00 |
君子兰茎基腐病菌 F. oxysporum | 64.03±0.82 | 94.28±0.82 | 100.00±0.00 |
小麦赤霉病菌 F. graminearum | 82.03±2.28 | 100.00±0.00 | 100.00±0.00 |
小麦纹枯病菌 R.cerealis | 80.89±0.96 | 100.00±0.00 | 78.66±3.62 |
小麦全蚀病菌 G. graminis | 31.27±2.13 | 100.00±0.00 | 100.00±0.00 |
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