Refilling of Embolized Vessels in Young Stems of Laurel. Do We Need a New Paradigm?
摘要：
Recovery of hydraulic conductivity after the induction of embolisms was studied in woody stems of laurel (Laurus nobilis). Previous experiments confirming the recovery of hydraulic conductivity when xylem pressure potential was less than -1 MPa were repeated, and new experiments were done to investigate the changes in solute composition in xylem vessels during refilling. Xylem sap collected by perfusion of excised stem segments showed elevated levels of several ions during refilling. Stem segments were frozen in liquid N2to view refilling vessels using cryoscanning electron microscopy. Vessels could be found in all three states of presumed refilling: (a) mostly water with a little air, (b) mostly air with a little water, or (c) water droplets extruding from vessel pits adjacent to living cells. Radiographic probe microanalysis of refilling vessels revealed nondetectable levels of dissolved solutes. Results are discussed in terms of proposed mechanisms of refilling in vessels while surrounding vessels were at a xylem pressure potential of less than -1 MPa. We have concluded that none of the existing paradigms explains the results.
展开
DOI：
10.1104/pp.120.1.11
被引量：
年份：
1999
国家科技图书文献中心
(权威机构)
academic.oup.com
掌桥科研
dx.doi.org
NCBI
查看更多
Oxford Univ Press
Europe PMC
JSTOR
NCBI
NRC Research Press
AGRIS
ResearchGate
ResearchGate
(全网免费下载)
ProQuest
EBSCO
学术范
plantphysiol.org
(全网免费下载)
学术范
(全网免费下载)
plantphysiol.org
naldc.nal.usda.gov
(全网免费下载)
SAGE
mysciencework.com
hortsci.ashspublications.org
mendeley.com
deepdyve.com
amjbot.org
core.ac.uk
onacademic.com
plantphysiology.org
forest.ckcest.cn
www.socolar.com
pubag.nal.usda.gov
(全网免费下载)
钛学术
钛学术
(全网免费下载)
ResearchGate
(全网免费下载)
naldc.nal.usda.gov
(全网免费下载)
plantphysiol.org
(全网免费下载)
pubag.nal.usda.gov
(全网免费下载)
学术范
(全网免费下载)
钛学术
(全网免费下载)
通过文献互助平台发起求助，成功后即可免费获取论文全文。
相似文献
参考文献
引证文献
辅助模式
引用
文献可以批量引用啦~
欢迎点我试用！
