Study on biological functions and identification of Bacillus sp. insecticidal strain HZ179

doi:10.16178/j.issn.0528-9017.20230924

Abstract

Abstract:

To clarify the taxonomic category and related biological functions of Bacillus sp. strain HZ179, morphological, physiological and biochemical characteristics, as well as 16S rDNA and gyrB sequence analysis were conducted. Effects of strain HZ179 on the growth index, defense enzyme activity, and tannin content of pepper seedlings were determined through pot experiments; and the antibacterial activity on symbiont of Aphis gossypii was evaluated by diagnostic PCR method. The results indicated that strain HZ179 belonged to Bacillus velezensis. The plant height, stem diameter, dry weight, root to shoot ratio, and seedling strength index of seedlings irrigated with 100 times diluted HZ179 powder increased by 44.19%, 15.70%, 22.47%, 16.18%, and 16.71% respectively, compared with the control. And the activities of enzymes such as superoxide dismutase (SOD), peroxidase (POD), polyphenol oxidase (PPO), phenylalanine ammonia lyase (PAL), and the content of tannin in leaves were significantly enhanced and maintained at a high level for 14 days. The infection species and infection rates of symbiont in Aphis gossypii in the HZ179 treatment group were lower than those in the control group. B. velezensis strain HZ179 could promote the growth of pepper seedlings, induce systemic resistance, and inhibite symbiont of Aphis gossypii.

Key words: Bacillus velezensis, Capsicum annuum L., growth promotion, systemic resistance induction, symbiont

CLC Number:

S433

ZHU Lihong, XIANG Huijuan, SHI Yuefeng, LIU Hao. Study on biological functions and identification of Bacillus sp. insecticidal strain HZ179[J]. Journal of Zhejiang Agricultural Sciences, 2024, 65(11): 2628-2635.

Figures/Tables 7

References 42

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共生菌种类	扩增基因	引物名称	引物序列(5'-3')	产物大小/bp	参考文献
Arsenophonus sp.	23S rDNA	Ars23-1 Are23-2	CGTTTGATGAATTCATAGTCAAA GGTCCTCCAGTTAGTGTTACCCAAC	600	[19]
Portiera aleyrodidarum	16S rRNA	28F 1098F	TGCAAGTCGAGCGGCATCAT AAAGTTCCCGCCTTATGCGT	1 000	[20]
Spiroplasma sp.	16S rRNA	16SA1 TKSSspR	AGAGTTTGATCMTGGCTCAG TAGCCGTGGCTTTCTGGTAA	510	[21]
Regiella insecticola	16S rRNA	U99F 16SB4	ATCGGGGAGTAGCTTGCTAC CTAGAGATCGTCGCCTAGGTA	200	[21]
Rickettsia sp.	16S rRNA	Rb-F Rb-R	GCTCAGAACGAACGCTATC GAAGGAAAGCATCTCTGC	900	[22]
Hamiltonella defensea	16S rRNA	92F 1343R	TGAGTAAAGTCTGGGAATCTGG CCCGGGAACGTATTCACCGTAG	1 250	[23]
Wolbachia sp.	16S rRNA	81F 691R	TGGTCCAATAAGTGATGAAGAAAC AAAAATTAAACGCTACTCCA	600	[23]
Buchnera aphidicola	16S rRNA	Buch16S1F Buch16S1R	GAGCTTGCTCTCTTTGTCGGCAA CTTCTGCGGGTAACGTCACGAA	430	[21]

共生菌种类	扩增基因	引物名称	引物序列(5'-3')	产物大小/bp	参考文献
Arsenophonus sp.	23S rDNA	Ars23-1 Are23-2	CGTTTGATGAATTCATAGTCAAA GGTCCTCCAGTTAGTGTTACCCAAC	600	[19]
Portiera aleyrodidarum	16S rRNA	28F 1098F	TGCAAGTCGAGCGGCATCAT AAAGTTCCCGCCTTATGCGT	1 000	[20]
Spiroplasma sp.	16S rRNA	16SA1 TKSSspR	AGAGTTTGATCMTGGCTCAG TAGCCGTGGCTTTCTGGTAA	510	[21]
Regiella insecticola	16S rRNA	U99F 16SB4	ATCGGGGAGTAGCTTGCTAC CTAGAGATCGTCGCCTAGGTA	200	[21]
Rickettsia sp.	16S rRNA	Rb-F Rb-R	GCTCAGAACGAACGCTATC GAAGGAAAGCATCTCTGC	900	[22]
Hamiltonella defensea	16S rRNA	92F 1343R	TGAGTAAAGTCTGGGAATCTGG CCCGGGAACGTATTCACCGTAG	1 250	[23]
Wolbachia sp.	16S rRNA	81F 691R	TGGTCCAATAAGTGATGAAGAAAC AAAAATTAAACGCTACTCCA	600	[23]
Buchnera aphidicola	16S rRNA	Buch16S1F Buch16S1R	GAGCTTGCTCTCTTTGTCGGCAA CTTCTGCGGGTAACGTCACGAA	430	[21]

鉴定项目	HZ179	B.velezensis	鉴定项目	HZ179	B.velezensis
葡萄糖氧化发酵	+	+	H₂S产生	+	+
过氧化氢酶	+	+	吲哚产生	-	+
接触酶	+	+	柠檬酸盐利用	-	+
V-P测定	+	+	硝酸盐还原	+	+
甲基红	-	-	葡萄糖	+	+
精氨酸双水解酶	+	-	蔗糖	+	+
淀粉水解	+	+	甘露醇	+	+
酪朊水解	+	+	D-甘露糖	-	+
明胶液化	+	+	D-棉子糖	-	+
Tween-80	-	-	D-果糖	+	+

鉴定项目	HZ179	B.velezensis	鉴定项目	HZ179	B.velezensis
葡萄糖氧化发酵	+	+	H₂S产生	+	+
过氧化氢酶	+	+	吲哚产生	-	+
接触酶	+	+	柠檬酸盐利用	-	+
V-P测定	+	+	硝酸盐还原	+	+
甲基红	-	-	葡萄糖	+	+
精氨酸双水解酶	+	-	蔗糖	+	+
淀粉水解	+	+	甘露醇	+	+
酪朊水解	+	+	D-甘露糖	-	+
明胶液化	+	+	D-棉子糖	-	+
Tween-80	-	-	D-果糖	+	+

处理	株高/cm	茎粗/mm	植株干重/mg	根冠比	壮苗指数
水	6.63±0.04 A a	1.21±0.01 A a	244.26±3.21 A a	0.136±0.002 A a	77.80±1.13 A a
HZ179粉剂150倍液	8.37±0.03 B b	1.33±0.03 B b	270.63±1.23 B b	0.146±0.002 B b	85.13±0.84 B b
HZ179粉剂100倍液	9.56±0.04 C c	1.40±0.02 C c	299.14±4.24 C c	0.158±0.001 C c	90.80±1.38 C c