摘要: |
为明确不同寄主树皮内含物与南方锦天牛 Acalolepta speciosa 危害程度的相关关系, 研究针对
高州油茶 Camellia drupifera、 油茶 C. oleifera 和广宁红花油茶 C. semiserrata 进行了南方锦天牛取食与树皮
内含物相关性的分析。 研究发现, 3 个树种的韧皮部内含物含量普遍高于木质部。 南方锦天牛对高州油茶
和油茶表现出明显的取食偏好, 这种偏好与可溶性糖、 还原糖、 总酚含量并无显著相关性, 而与单宁含
量呈极显著正相关关系 (P<0. 01)。 广宁红花油茶由于具有较高的碳氮比及可能的其他生物碱成分, 导致
南方锦天牛对其取食量较少。 此外, 苯丙氨酸含量与取食面积呈显著正相关关系 (P<0. 05), 而赖氨酸、
精氨酸、 组氨酸含量较高的高州油茶和油茶更受南方锦天牛的喜爱。 天牛的取食行为受多种因素影响,
其具体作用机制还需进一步深入研究。 |
关键词: 南方锦天牛 山茶属 营养物质 取食量 |
DOI: |
分类号: |
基金项目:广东省林业科技创新项目 (2024KJCX019), 广东省地方标准制 (修) 订项目 (2022-DB-03)。 |
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Effects of Nutrient Content and Secondary Metabolites in Three Camellia spp. on Feeding of Acalolepta speciosa |
LYU Yuzhou1, Yuan Haibo2, Gao Chenglong2, Zhao Danyang2
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1.State-owned Xiaokeng Forest Farm, Qujiang District, Shaoguan City, Guangdong;2.Guangdong Academy of Forestry
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Abstract: |
To clarify the correlation between the bark contents of different hosts and the damage degree of
Acalolepta speciosa, the correlation between the feeding of A. speciosa and the bark contents of Camellia drupifera, C. oleifera, and C. semiserrata was analyzed. The results indicated that the content of phloem constituents
in the three Camellia species was generally higher than that of xylem. A. speciosa showed a clear preference for
C. drupifera and C. oleifera. There was no significant correlation between this preference and soluble sugar, reducing sugar and total phenol content, but there was a significant positive correlation with tannin content (P<
0. 05). The higher carbon -to -nitrogen ratio and potential alkaloids in C. semiserrata may explain the lower
feeding amounts of A. speciosa on this variety. Furthermore, the phenylalanine content was positively associated with the feeding area (P<0. 05). C. drupifera and C. oleifera, with higher lysine, arginine, and histidine levels, were preferred by A. speciosa. The feeding behavior of A. speciosa is multifactorial, necessitating further
detailed study to elucidate the underlying mechanisms. |
Key words: Acalolepta speciosa Camellia nutrients feeding amounts |