Severity: Warning
Message: file_get_contents(https://...@gmail.com&api_key=61f08fa0b96a73de8c900d749fcb997acc09): Failed to open stream: HTTP request failed! HTTP/1.1 429 Too Many Requests
Filename: helpers/my_audit_helper.php
Line Number: 143
Backtrace:
File: /var/www/html/application/helpers/my_audit_helper.php
Line: 143
Function: file_get_contents
File: /var/www/html/application/helpers/my_audit_helper.php
Line: 209
Function: simplexml_load_file_from_url
File: /var/www/html/application/helpers/my_audit_helper.php
Line: 994
Function: getPubMedXML
File: /var/www/html/application/helpers/my_audit_helper.php
Line: 3134
Function: GetPubMedArticleOutput_2016
File: /var/www/html/application/controllers/Detail.php
Line: 574
Function: pubMedSearch_Global
File: /var/www/html/application/controllers/Detail.php
Line: 488
Function: pubMedGetRelatedKeyword
File: /var/www/html/index.php
Line: 316
Function: require_once
Plants secrete a plethora of metabolites into the rhizosphere that allow them to obtain nutrients necessary for growth and modify microbial communities around the roots. Plants release considerable amounts of photosynthetically fixed carbon into the rhizosphere; hence, it is important to understand how carbon moves from the roots into the rhizosphere. Approaches used previously to address this question involved radioactive tracers, fluorescent probes, and biosensors to study sugar movement in the roots and into the rhizosphere. Although quite effective for studying sugar movement, it has been challenging to obtain data on spatial and temporal variability in sugar exudation using these techniques. In this study, we developed a gel-based enzyme-coupled colorimetric and fluorometric assay to image glucose (Glc) in vivo and used this assay to show that there is spatial variability in Glc release from plant roots. We found that the primary roots of maize () released more Glc from the base of the root than from the root tip and that the Glc release rate is reduced in response to water stress. These findings were confirmed independently by quantifying Glc release in well-watered and water-stressed maize primary roots using high-performance anion-exchange chromatography. Additionally, we demonstrated differential patterns of Glc exudation in different monocot and eudicot plant species. These findings and their implications on root-rhizosphere interactions are discussed.
Download full-text PDF |
Source |
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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6236618 | PMC |
http://dx.doi.org/10.1104/pp.18.00614 | DOI Listing |
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