文献类型：期刊文献

英文题名：Mangrove species found in contrasting environments show differing phytohormonal responses to variation in soil bulk density

作者：Ola, Anne[1] Dodd, Ian C.[2] Albacete, Alfonso[3] Xiong, Yanmei[1,4] Rasmussen, Amanda[5] De Diego, Nuria[6] Lovelock, Catherine E.[1]

第一作者：Ola, Anne

通信作者：Ola, A[1]

机构：[1]Univ Queensland, Sch Environm, St Lucia, QLD 4072, Australia;[2]Univ Lancaster, Lancaster Environm Ctr, Bailrigg LA1 4YW, England;[3]CSIC, Ctr Edafol & Biol Aplicada Segura, Dept Nutr Vegetal, Campus Univ Espinardo, Murcia 30100, Spain;[4]Chinese Acad Forestry, Res Inst Trop Forestry, Guangzhou 510520, Peoples R China;[5]Univ Nottingham, Sch Biosci, Loughborough LE12 5RD, England;[6]Palacky Univ, Czech Adv Technol & Res Inst, Olomouc 78371, Czech Republic

年份：2024

外文期刊名：PLANT AND SOIL

收录：;Scopus(收录号：2-s2.0-85183907678);WOS:【SCI-EXPANDED(收录号:WOS:001155814000001)】；

基金：We would like to thank R. de Albuquerque Ribeiro and Z. Shribman for their help in assessing root traits.

语种：英文

外文关键词：Adaptation; Avicennia marina; Ethylene; Inhibitors (AIB, CoCl2); Rhizophora stylosa; Roots

摘要：Background and aims Mangrove species respond to variation in soil bulk density (BD). However, very little is known about the regulatory mechanisms that trigger these responses. Methods Endogenous concentrations of different phytohormones were measured in the roots of two mangrove species (Avicennia marina and Rhizophora stylosa) grown in low and high BD soils. The potential involvement of ethylene in regulating plant growth responses was tested by applying the ethylene biosynthesis inhibitors cobalt chloride (CoCl2) and aminoisobutyric acid (AIB). Results The two mangrove species responded differently to variation in soil BD. High BD decreased root growth of R. stylosa, but not A. marina. Soil BD had no effect on root phytohormone levels in R. stylosa, but loose soils increased 1-aminocyclopropane-1-carboxylic acid whilst decreasing salicylic acid and gibberellin in A. marina. Applying ethylene inhibitors enhanced R. stylosa root growth, while increasing indole-3-acetic acid but decreasing isopentenyl adenine levels. In contrast, AIB inhibited A. marina root growth, while increasing trans-zeatin levels. Ethylene inhibitors affected salicylic acid levels in both species. Conclusion Salicylic acid is central to root growth responses to variation in BD in A. marina. Conversely, the interaction of ethylene and gibberellin drives responses in R. stylosa. Hormonal interactions involving ethylene potentially reflect the adaptations of the two species to differing conditions within the intertidal zone, with A. marina behaving like an aquatic species and R. stylosa behaving like a terrestrial species.