Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1093/jxb/erg221 |
Cavitation, stomatal conductance, and leaf dieback in seedlings of two co-occurring Mediterranean shrubs during an intense drought | |
Vilagrosa, A; Bellot, J; Vallejo, VR; Gil-Pelegrin, E | |
通讯作者 | Vilagrosa, A |
来源期刊 | JOURNAL OF EXPERIMENTAL BOTANY
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ISSN | 0022-0957 |
出版年 | 2003 |
卷号 | 54期号:390页码:2015-2024 |
英文摘要 | Seedling shrubs in the Mediterranean semi-arid climate are subjected to intense droughts during summer. Thus, seedlings often surpass their limits of tolerance to water stress, resulting in the loss of hydraulic conductivity due to xylem cavitation. The response in terms of stomatal conductance, vulnerability to cavitation, leaf dieback, and survival were analysed in two co-occurring seedlings of mastic tree (Pistacia lentiscus L.) and kermes oak (Quercus coccifera L.) during an intense drought period. Both species reacted to drought with steep decreases in stomatal conductance before the critical water potential brought about the onset of cavitation events. Q. coccifera showed wider safety margins for avoiding runaway embolism than P. lentiscus and these differences could be related to the particular drought strategy displayed by each species: water saver or water spender. The limits for survival, resprout capacity and leaf dieback were also analysed in terms of loss of conductivity. By contrast with previous studies, the species showing higher seedling survival in the presence of drought also showed higher susceptibility to cavitation and operated with a lower safety margin for cavitation. Both species showed a leaf specific conductivity (LSC) threshold below which leaf biomass had to be regulated to avoid runaway embolism. However, each species displayed a different type of response: A lentiscus conserved total leaf area up to 100% loss of LSC, whereas Q. coccifera continuously adjusted leaf biomass throughout the drought period in order to maintain the LSC very close to the maximum values recorded without loss of conductivity. Both species maintained the capacity for survival until the loss of conductivity was very nearly 100%. |
英文关键词 | drought stress leaf dieback Mediterranean shrubs stomatal conductance survival xylem cavitation |
类型 | Review |
语种 | 英语 |
国家 | Spain |
收录类别 | SCI-E |
WOS记录号 | WOS:000185064100003 |
WOS关键词 | XYLEM CAVITATION ; HYDRAULIC CONDUCTANCE ; LAURUS-NOBILIS ; EMBOLISM ; VULNERABILITY ; PLANTS ; PHOTOSYNTHESIS ; TRANSPIRATION ; LIMITATION ; RESISTANCE |
WOS类目 | Plant Sciences |
WOS研究方向 | Plant Sciences |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/145127 |
作者单位 | (1)Univ Alicante, Dept Ecol, CEAM, E-03080 Alicante, Spain;(2)CEAM, E-46980 Paterna, Spain;(3)SIA DGA, Unidad Recursos Forestales, E-50080 Zaragoza, Spain |
推荐引用方式 GB/T 7714 | Vilagrosa, A,Bellot, J,Vallejo, VR,et al. Cavitation, stomatal conductance, and leaf dieback in seedlings of two co-occurring Mediterranean shrubs during an intense drought[J],2003,54(390):2015-2024. |
APA | Vilagrosa, A,Bellot, J,Vallejo, VR,&Gil-Pelegrin, E.(2003).Cavitation, stomatal conductance, and leaf dieback in seedlings of two co-occurring Mediterranean shrubs during an intense drought.JOURNAL OF EXPERIMENTAL BOTANY,54(390),2015-2024. |
MLA | Vilagrosa, A,et al."Cavitation, stomatal conductance, and leaf dieback in seedlings of two co-occurring Mediterranean shrubs during an intense drought".JOURNAL OF EXPERIMENTAL BOTANY 54.390(2003):2015-2024. |
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