skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Is desiccation tolerance and avoidance reflected in xylem and phloem anatomy of two co-existing arid-zone coniferous trees?: Xylem and Phloem Anatomy

Abstract

Plants close their stomata during drought to avoid excessive water loss, but species differ in respect to the drought severity at which stomata close. The stomatal closure point is related to xylem anatomy and vulnerability to embolism, but it also has implications for phloem transport, and possibly phloem anatomy to allow sugar transport at low water potentials. Desiccation tolerant plants that close their stomata at severe drought should have smaller xylem conduits and/or fewer and smaller inter-conduit pits to reduce vulnerability to embolism, but more phloem tissue and larger phloem conduits compared to plants that avoid desiccation. These anatomical differences could be expected to increase in response to long-term reduction in precipitation. To test these hypotheses we used tridimensional synchroton X-ray microtomograph and light microscope imaging of combined xylem and phloem tissues of two coniferous species: one-seed juniper (Juniperus monosperma) and piñon pine (Pinus edulis) subjected to precipitation manipulation treatments. These species show different xylem vulnerability to embolism, contrasting desiccation tolerance, and stomatal closure points. Our results support the hypothesis that desiccation tolerant plants require higher phloem transport capacity than desiccation avoiding plants, but this can be gained through various anatomical adaptations in addition to changing conduit or tissue size.

Authors:
ORCiD logo [1];  [1];  [1];  [2];  [3];  [4];  [5]; ORCiD logo [5];  [5]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  2. Swiss Federal Lab. for Material Science and Technology (Empa), Duebendorf (Switzerland)
  3. Paul Scherrer Inst. (PSI), Villigen (Switzerland). Swiss Light Source
  4. Swiss Federal Lab. for Material Science and Technology (Empa), Duebendorf (Switzerland); Federal Inst. of Technology, Zurich (Switzerland)
  5. Univ. of New Mexico, Albuquerque, NM (United States). Dept. of Biology
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE Laboratory Directed Research and Development (LDRD) Program; USDOE Office of Science (SC), Biological and Environmental Research (BER) (SC-23); Paul Scherrer Institute; University of New Mexico
OSTI Identifier:
1431064
Report Number(s):
LA-UR-17-23770
Journal ID: ISSN 0140-7791
Grant/Contract Number:  
AC52-06NA25396
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Plant, Cell and Environment
Additional Journal Information:
Journal Volume: 41; Journal Issue: 7; Journal ID: ISSN 0140-7791
Publisher:
Wiley
Country of Publication:
United States
Language:
English
Subject:
59 BASIC BIOLOGICAL SCIENCES; Biological Science; Earth Sciences; plant anatomy; water transport; sugar transport; xylem; phloem; Inter-conduit pit; stomatal closure point; xylem vulnerability

Citation Formats

Sevanto, Sanna Annika, Ryan, Max, Turin Dickman, L., Derome, Dominique, Patera, Alessandra, Defraeye, Thijs, Pangle, Robert E., Hudson, Patrick J., and Pockman, William T. Is desiccation tolerance and avoidance reflected in xylem and phloem anatomy of two co-existing arid-zone coniferous trees?: Xylem and Phloem Anatomy. United States: N. p., 2018. Web. doi:10.1111/pce.13198.
Sevanto, Sanna Annika, Ryan, Max, Turin Dickman, L., Derome, Dominique, Patera, Alessandra, Defraeye, Thijs, Pangle, Robert E., Hudson, Patrick J., & Pockman, William T. Is desiccation tolerance and avoidance reflected in xylem and phloem anatomy of two co-existing arid-zone coniferous trees?: Xylem and Phloem Anatomy. United States. doi:10.1111/pce.13198.
Sevanto, Sanna Annika, Ryan, Max, Turin Dickman, L., Derome, Dominique, Patera, Alessandra, Defraeye, Thijs, Pangle, Robert E., Hudson, Patrick J., and Pockman, William T. Thu . "Is desiccation tolerance and avoidance reflected in xylem and phloem anatomy of two co-existing arid-zone coniferous trees?: Xylem and Phloem Anatomy". United States. doi:10.1111/pce.13198.
@article{osti_1431064,
title = {Is desiccation tolerance and avoidance reflected in xylem and phloem anatomy of two co-existing arid-zone coniferous trees?: Xylem and Phloem Anatomy},
author = {Sevanto, Sanna Annika and Ryan, Max and Turin Dickman, L. and Derome, Dominique and Patera, Alessandra and Defraeye, Thijs and Pangle, Robert E. and Hudson, Patrick J. and Pockman, William T.},
abstractNote = {Plants close their stomata during drought to avoid excessive water loss, but species differ in respect to the drought severity at which stomata close. The stomatal closure point is related to xylem anatomy and vulnerability to embolism, but it also has implications for phloem transport, and possibly phloem anatomy to allow sugar transport at low water potentials. Desiccation tolerant plants that close their stomata at severe drought should have smaller xylem conduits and/or fewer and smaller inter-conduit pits to reduce vulnerability to embolism, but more phloem tissue and larger phloem conduits compared to plants that avoid desiccation. These anatomical differences could be expected to increase in response to long-term reduction in precipitation. To test these hypotheses we used tridimensional synchroton X-ray microtomograph and light microscope imaging of combined xylem and phloem tissues of two coniferous species: one-seed juniper (Juniperus monosperma) and piñon pine (Pinus edulis) subjected to precipitation manipulation treatments. These species show different xylem vulnerability to embolism, contrasting desiccation tolerance, and stomatal closure points. Our results support the hypothesis that desiccation tolerant plants require higher phloem transport capacity than desiccation avoiding plants, but this can be gained through various anatomical adaptations in addition to changing conduit or tissue size.},
doi = {10.1111/pce.13198},
journal = {Plant, Cell and Environment},
number = 7,
volume = 41,
place = {United States},
year = {Thu Mar 22 00:00:00 EDT 2018},
month = {Thu Mar 22 00:00:00 EDT 2018}
}

Journal Article:
Free Publicly Available Full Text
This content will become publicly available on March 22, 2019
Publisher's Version of Record

Save / Share: