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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Short-term changes of fructans in ryegrass (Lolium multiflorum `Lema') in response to urban air pollutants and meteorological conditions

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Sandrin, Carla Zuliani [1] ; Leone Figueiredo-Ribeiro, Rita de Cassia [1] ; Carvalho Delitti, Welington Braz [2] ; Domingos, Marisa [1]
Total Authors: 4
[1] Inst Bot, BR-04045972 Sao Paulo - Brazil
[2] Univ Sao Paulo, Inst Biociencias, Dept Ecol, BR-05422970 Sao Paulo - Brazil
Total Affiliations: 2
Document type: Journal article
Web of Science Citations: 5

We investigated whether the fructan content, a storage carbohydrate, of Lolium multiflorum `Lema' plants grown in a subtropical urban environment characterized by typical diurnal profiles of air pollutants and meteorological conditions changed over the course of a day during different seasons. Plants were collected every 2 h on the last day of each two-month seasonal field experiment and separated into shoot (stubble or stubble+leaf blades) and roots for carbohydrate analyses and biomass determination. Diurnal contents of total fructose in the stubbles increased with high temperatures. In the roots, fructose accumulation showed a positive relation with hourly variations of both temperature and particulate matter and a negative relation with irradiance and SO2. Seasonal variation in shoot and root biomasses coincided with the seasonal variation of total fructose and were negatively affected by relative humidity and SO2, respectively. We concluded that hourly changes of fructans over the course of a day may increase the ability of L. multiflorum to tolerate short-term oscillations in weather and air pollution commonly observed in the subtropical urban environment, increasing its efficiency in monitoring air quality. (C) 2013 Elsevier Inc. All rights reserved. (AU)

FAPESP's process: 00/06422-4 - Caesalpinia echinata Lam. (Brazil-wood): from seed to wood, a model for studies on tropical Brazilian trees
Grantee:Rita de Cassia Leone Figueiredo Ribeiro
Support type: Research Projects - Thematic Grants
FAPESP's process: 05/04139-7 - Carbohydrates of tropical species as modulators of ecophysiological processes and as environmental stress response markers
Grantee:Marcia Regina Braga
Support type: Research Projects - Thematic Grants