外源IAA和6-BA对云南松平茬苗木生物量分配规律与异速生长关系的影响

doi:10.13292/j.1000-4890.202504.027

生态学杂志 ›› 2025, Vol. 44 ›› Issue (4): 1104-1113.doi: 10.13292/j.1000-4890.202504.027

外源IAA和6-BA对云南松平茬苗木生物量分配规律与异速生长关系的影响

成思丽^1,2,顾雪莎^1,2,胡兆柳^1,2,唐光鹏^1,2,贺斌^3*,陈林^1,2,陈诗^1,2,许玉兰^1,2,蔡年辉^1,2*

（¹西南林业大学西南山地森林资源保育与利用教育部重点实验室，昆明 650224; ²西南林业大学西南地区生物多样性保育国家林业和草原局重点实验室，昆明 650224; ³云南交通职业技术学院，昆明 650500）

出版日期:2025-04-10 发布日期:2025-04-10

The impacts of exogenous IAA and 6-BA on biomass allocation and allometric growth relationships in stumping seedlings of Pinus yunnanensis.#br#

CHENG Sili^1,2, GU Xuesha^1,2, HU Zhaoliu^1,2, TANG Guangpeng^1,2, HE Bin^3*, CHEN Lin^1,2, CHEN Shi^1,2, XU Yulan^1,2, CAI Nianhui^1,2*

(¹Key Laboratory of Forest Resources Conservation and Utilization in the Southwest Mountains of China Ministry of Education, Southwest Forestry University, Kunming 650224, China; ²Key Laboratory of National Forestry and Grassland Administration on Biodiversity Conservation in Southwest China, Southwest Forestry University, Kunming 650224, China; ³Yunnan Communications Vocational and Technical College, Kunming 650500, China).

Online:2025-04-10 Published:2025-04-10

摘要/Abstract

摘要： 为了解云南松平茬苗木生物量分配及异速生长对外源3吲哚乙酸（IAA）和6苄氨基嘌呤（6-BA）的响应，以平茬后的云南松苗木为材料，设置3个IAA水平（0、150、300 mg·L^-1）与3个6-BA水平（0、100、200 mg·L^-1）各两两组合共9个不同的处理，测定IAA和6-BA两种植物激素不同组合处理下云南松苗木的生物量，分析苗木生物量积累及分配与不同外源IAA和6-BA的关系，并采用标准主轴回归分析云南松苗木各器官之间在不同处理下的异速生长关系。结果表明，与对照（J1）相比，不同处理对云南松苗木各器官的生物量积累与分配无显著差异（P>0.05）。但在不同处理间，高浓度IAA和中浓度6-BA（J8）处理更利于根和茎生物量积累，而高浓度IAA和6-BA处理（J9）优先将资源分配给茎，中浓度IAA处理（J4和J6）优先将资源分配给叶。不同处理对云南松生物量积累影响不同，总体来看，对于根、茎和叶来说，其生物量积累效果表现为：IAA和6-BA配施>单施6-BA>单施IAA，对于地上和单株生物量，单施IAA>IAA和6-BA配施>单施6-BA。不同处理下各器官之间异速生长关系不同，总体表现为在J6、J7和J9处理下呈异速生长，其余处理多为等速生长。研究表明，IAA与6-BA配施效果优于单施效果，异速生长关系在不同处理下并不一致，既存在等速生长又有异速生长，反映了云南松苗木在不同外源激素处理下采取不同的生长策略。

关键词: 云南松, 外源激素, 生物量投资与分配, 曲面方程, 异速生长关系

Abstract: We investigated biomass allocation and allometric growth of Pinus yunnanensis seedlings in response to exogenous indole-3-acetic acid (IAA) and 6-benzylaminopurine (6-BA). Three levels of IAA (0, 150, 300 mg·L^-1) and three levels of 6-BA (0, 100, 200 mg·L^-1) were combined in pairs and total nine treatments were set up to measure biomass of P. yunnanensis seedlings under different combinations of IAA and 6-BA treatments. The standard major axis (SMA) regression analyses were employed to explore the allometric growth relationships among different organs of P. yunnanensis seedlings under different treatments. The results showed that different treatments did not affect biomass accumulation and allocation among various organs of P. yunnanensis seedlings compared to the control (J1) (P>0.05). High concentration IAA and medium concentration 6-BA (J8) treatment favored biomass accumulation in roots and stems. High concentration IAA and 6-BA treatment (J9) prioritized resource allocation to stems. Medium concentration IAA treatment (J4 and J6) prioritized resource allocation to leaves. The impact of different treatments on root, stem and leaf biomass varied in order: combined IAA and 6-BA treatment > single 6-BA treatment > single IAA treatment. The impact of different treatments on aboveground and total biomass accumulation followed an order: single IAA treatment > combined IAA and 6-BA treatment > single 6-BA treatment. The allometric growth relationships among different organs varied under different treatments. Among them, J6, J7, and J9 treatments generally showed allometric growth, while other treatments mostly exhibited isometric growth. Our results suggested that the combined application of IAA and 6-BA was more effective than the single application. The allometric growth relationships varied under different treatments, exhibiting both isometric and allometric growth, which reflected the different growth strategies of P. yunnanensis seedlings.

Key words: Pinus yunnanensis, exogenous hormone, biomass investment and allocation, surface equation, allometric relationship

成思丽, 顾雪莎, 胡兆柳, 唐光鹏, 贺斌, 陈林, 陈诗, 许玉兰, 蔡年辉. 外源IAA和6-BA对云南松平茬苗木生物量分配规律与异速生长关系的影响[J]. 生态学杂志, 2025, 44(4): 1104-1113.

CHENG Sili, GU Xuesha, HU Zhaoliu, TANG Guangpeng, HE Bin, CHEN Lin, CHEN Shi, XU Yulan, CAI Nianhui. The impacts of exogenous IAA and 6-BA on biomass allocation and allometric growth relationships in stumping seedlings of Pinus yunnanensis.#br#[J]. Chinese Journal of Ecology, 2025, 44(4): 1104-1113.

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外源IAA和6-BA对云南松平茬苗木生物量分配规律与异速生长关系的影响

The impacts of exogenous IAA and 6-BA on biomass allocation and allometric growth relationships in stumping seedlings of Pinus yunnanensis.#br#

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