Variable conductivity and embolism in roots and branches of four contrasting tree species and their impacts on whole-plant hydraulic performance under future atmospheric CO2 concentration

نویسندگان

  • JEAN-CHRISTOPHE DOMEC
  • KARINA SCHÄFER
  • RAM OREN
  • HYUN S. KIM
  • HEATHER R. McCARTHY
چکیده

JEAN-CHRISTOPHE DOMEC, KARINA SCHÄFER, RAM OREN, HYUN S. KIM and HEATHER R. McCARTHY 1 Nicholas School of the Environment and Earth Sciences, Box 90328, Duke University, Durham, NC 27708, USA 2 Corresponding authors ([email protected]; [email protected]) 3 Department of Forestry and Environmental Resources, North Carolina State University, Raleigh, NC 27695, USA 4 Federated Department of Biological Sciences, Rutgers University, Newark, NJ 07102, USA 5 Department of Earth System Science, University of California, Irvine, CA 92697, USA

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Variable conductivity and embolism in roots and branches of four contrasting tree species and their impacts on whole-plant hydraulic performance under future atmospheric CO₂ concentration.

Anatomical and physiological acclimation to water stress of the tree hydraulic system involves trade-offs between maintenance of stomatal conductance and loss of hydraulic conductivity, with short-term impacts on photosynthesis and long-term consequences to survival and growth. Here, we study the role of variations in root and branch maximum hydraulic specific conductivity (k(s-max)) under high...

متن کامل

An annual pattern of native embolism in upper branches of four tall conifer species.

PREMISE OF THE STUDY The Pacific Northwest of North America experiences relatively mild winters and dry summers. For the tall coniferous trees that grow in this region, we predicted that loss in the hydraulic conductivity of uppermost branches would be avoided because of difficulty reversing accumulated emboli in xylem that is always under negative pressure. METHODS To test this hypothesis, w...

متن کامل

Xylem recovery from drought-induced embolism: where is the hydraulic point of no return?

For terrestrial plants, maintenance of the integrity of the rootto-leaf water transport pathway is essential for sustaining photosynthetic 9as exchange and growth. The problem of maintaining long-distance water transport is especially challengin9 in trees because path-length resistances and gravity can result in steep gradients of increasing xylem tension from roots to terminal branches, potent...

متن کامل

Vegetation-zonation patterns across a temperate mountain cloud forest ecotone are not explained by variation in hydraulic functioning or water relations.

Many studies have demonstrated linkages between the occurrence of fog and ecophysiological functioning in cloud forests, but few have investigated hydraulic functioning as a determining factor that explains sharp changes in vegetation. The objective of this study was to compare the plant water status during cloud-immersed and non-immersed conditions and hydraulic vulnerability in branches and r...

متن کامل

Hydraulic architecture and water relations of a flood-tolerant tropical tree, Annona glabra.

Hydraulic architecture parameters, water relation parameters and wood anatomy were studied in roots and shoots of the flood-tolerant tree Annona glabra L. on Barro Colorado Island, Panama. Hydraulic conductivity, leaf specific conductivity, and Huber value were similar to the corresponding values for tree species living in non-flooded habitats. The vulnerability of stems to loss of hydraulic co...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2010