Growth and physiological responses of two mangrove species (Bruguiera gymnorrhiza and Kandelia candel) to waterlogging |
| |
| Institution: | 1. College of Agriculture, Guizhou University, Guiyang, Guizhou, 550025, China;2. Guizhou Institute of Subtropical Crops, Guizhou Academy of Agricultural Sciences, 1 Fenglindong Road, Xingyi, Guizhou, 562400, China;1. Posgrado en Ciencias del Mar y Limnología, Universidad Nacional Autónoma de México, Ciudad Universitaria, 04510 Ciudad de México, Mexico;2. Unidad Académica Procesos Oceánicos y Costeros, Instituto de Ciencias del Mar y Limnología, Universidad Nacional Autónoma de México, Ciudad Universitaria, 04510 Ciudad de México, Mexico;3. Unidad Académica Mazatlán, Instituto de Ciencias del Mar y Limnología, Universidad Nacional Autónoma de México, Calz. Joel Montes Camarena s/n, 82040 Mazatlán, Sinaloa, Mexico;4. Unidad Académica de Ecología y Biodiversidad Acuática, Instituto de Ciencias del Mar y Limnología, Universidad Nacional Autónoma de México, Ciudad Universitaria, 04510 Ciudad de Mexico, Mexico;5. Spiez Laboratory, Federal Office for Civil Protection, CH-3700 Spiez, Switzerland;6. Centre de Recherche sur la dynamique du système Terre (GEOTOP), Université du Québec à Montréal, 201 Avenue Président-Kennedy, Montréal H2X 3Y7, Canada;7. Département des sciences de la Terre et de l''atmosphère, Université du Québec à Montréal, 201 Avenue Président-Kennedy, Montréal H2X 3Y7, Canada;8. Centro de Ciencias de la Atmósfera, Universidad Nacional Autónoma de México, Ciudad Universitaria, 04510 Ciudad de México, Mexico;9. Centro de Estudios Ambientales de Cienfuegos, AP5 Ciudad Nuclear, CP 59350 Cienfuegos, Cuba |
| |
| Abstract: | Effects of duration of waterlogging on growth and physiological responses of two mangrove species, Bruguiera gymnorrhiza and Kandelia candel, were investigated. The relative growth rate of B. gymnorrhiza decreased significantly with waterlogged time, with the highest value found for drained plants and the lowest in plants under 12 weeks waterlogging. On the contrary, no significant difference was found between waterlogged and drained K. candel plants. The shoot to root biomass ratio of K. candel increased when subjected to 8 or 12 weeks waterlogging but little change was recorded in B. gymnorrhiza, indicating a shift in biomass allocation from roots to shoots in K. candel under prolonged waterlogging but not in B. gymnorrhiza. These different growth responses between the two mangrove species supported the hypothesis that K. candel is more tolerant to waterlogging than B. gymnorrhiza. Under 12 weeks waterlogged treatment, root oxidase activity significantly decreased in B. gymnorrhiza but increased in K. candel. Chlorophyll contents of K. candel increased more rapidly in response to waterlogging than B. gymnorrhiza. Activities of both peroxidase and superoxide dismutase increased significantly in leaves of K. candel when the waterlogging period was longer than 8 weeks, while only the peroxidase activity of B. gymnorrhiza showed a significant increase, indicating that K. candel had stronger resistance to the oxidant damage resulting from waterlogging. These physiological indicators further supported the hypothesis that K. candel is more tolerant to waterlogging than B. gymnorrhiza. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
