Differential leaf gas exchange responses to salinity and drought in the mangrove tree Avicecennia germinans (Avicenniaceae)

 

محفوظ في:
التفاصيل البيبلوغرافية
المؤلف: Sobrado, M. A.
التنسيق: artículo original
الحالة:Versión publicada
تاريخ النشر:2006
الوصف:Leaf gas exchange was assessed in Avicennia germinans L. grown under different NaCl concentra-tions (0-40‰), after salt-relief, and then during drought. Stomatal conductance (gs) and net photosynthetic rate (Pn) decreased with increasing NaCl concentration, and intrinsic water use efficiency (Pn / gs) increased. Under desalinization Pn / gs declined. Thus, gs did not change in plants grown at low NaCl concentration (10‰), but increased up to 30-32% at higher NaCl concentration (20 - 40‰). However, Pn was only slightly enhanced (10-15%). Under drought, Pn decreased by as much as 46% in plants grown at low NaCl concentration (10‰) and by 22% at high NaCl concentration (40‰). Thus, Pn / gs decreased and water use efficiency was lower during drought compared to estimates prior to salt-relief.
البلد:Portal de Revistas UCR
المؤسسة:Universidad de Costa Rica
Repositorio:Portal de Revistas UCR
اللغة:Español
OAI Identifier:oai:portal.ucr.ac.cr:article/13877
الوصول للمادة أونلاين:https://revistas.ucr.ac.cr/index.php/rbt/article/view/13877
كلمة مفتاحية:Avicennia germinans
manglar
NaCl
conductancia
estomas
eficiencia de uso de agua