Contenido nutrimental en hojas de Laguncularia racemosa (Combretaceae), relacionado con su fenología en una laguna tropical del Golfo de California, México

Acta Botanica Mexicana

Asahel Benítez-Hernández¹  Daniel Benítez-Pardo²  Francisco Amador-Cruz²  Francisco Flores-de-Santiago³ 

[1] Centro de Investigaciones Biológicas del Noroeste A.C.,;Universidad Autónoma de Sinaloa;Universidad Nacional Autónoma de México, Instituto de Ciencias del Mar y Limnología

关键词: contenido de nutrientes;    fenología;    Laguncularia racemosa;    mangle blanco;   

DOI  :  10.21829/abm124.2018.1326

学科分类：植物学

来源: Acta Botanica Mexicana

【 摘 要 】

Background and Aims:The phenological events in mangroves are usually influenced by factors such as water salinity, photoperiod and/or environmental temperature. This has been documented mainly for species of the family Rhizophoraceae and Acanthaceae; however, accessible studies for the family Combretaceae, e.g.,Laguncularia racemosa , are limited. Methods:We collected during one year, monthly, three to four leaves of the penultimate and antepenultimate internode of the branches of 10 trees ofLaguncularia racemosa . The collection of leaves was made considering eight phenological stages. The nutrients analyzed in the leaves were: total N, PO, K + , Ca 2+ , Mg 2+ , SO, Na + , Fe 2+ , Cu 2+ , B (H 3 BO 3 ), Mn 2+and Zn 2+ . Additionally, 10 samples of interstitial water (to measure mayor elements) and sediment (to measure pH and quantify the organic matter content) were taken at a depth between 0.3 to 0.6 m. Key results:The nutrients K + , Ca 2+ , Fe 2+ , Mg 2+and total N presented maximum values throughout the development of vegetative sprouting until the development of “fruits”, which means that the greatest importance of these nutrients is in the production of “fruits”. The Na +showed its highest concentration (22.8 g kg -1 ) in the beginning phase of flowering and the minimum during the quiescence (8.7 g kg -1 ). In contrast, SO, PO, Cu 2+ , B (H 3 BO 3 ), Zn 2+did not present differences. Finally, Mn 2+presented 109 mg kg -1at the end of vegetative sprouting and 34 mg kg -1at maturity and falling of “fruits”. Conclusions:In the absorption of nutrients, phenological stages and local climatic conditions are important.

【 授权许可】

CC BY-SA