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Gallart Marta Love Jonathan Meason Dean F. Coker Graham Clinton Peter W. Xue Jianming Jameson Paula E. Klápště Jaroslav Turnbull Matthew H. 《Plant and Soil》2019,435(1-2):353-366
Plant and Soil - Leaf litter decomposition is an important process controlling nutrient cycling in most terrestrial ecosystems. We evaluated the relationships among traits of green leaves and... 相似文献
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Juan Rodríguez‐Gamir Jianming Xue Michael J. Clearwater Dean F. Meason Peter W. Clinton Jean‐Christophe Domec 《Plant, cell & environment》2019,42(2):717-729
Stomatal regulation is crucial for forest species performance and survival on drought‐prone sites. We investigated the regulation of root and shoot hydraulics in three Pinus radiata clones exposed to drought stress and its coordination with stomatal conductance (gs) and leaf water potential (Ψleaf). All clones experienced a substantial decrease in root‐specific root hydraulic conductance (Kroot‐r) in response to the water stress, but leaf‐specific shoot hydraulic conductance (Kshoot‐l) did not change in any of the clones. The reduction in Kroot‐r caused a decrease in leaf‐specific whole‐plant hydraulic conductance (Kplant‐l). Among clones, the larger the decrease in Kplant‐l, the more stomata closed in response to drought. Rewatering resulted in a quick recovery of Kroot‐r and gs. Our results demonstrated that the reduction in Kplant‐l, attributed to a down regulation of aquaporin activity in roots, was linked to the isohydric stomatal behaviour, resulting in a nearly constant Ψleaf as water stress started. We concluded that higher Kplant‐l is associated with water stress resistance by sustaining a less negative Ψleaf and delaying stomatal closure. 相似文献
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