Journal of Food, Agriculture and Environment
Vol 10,
Issue 3&4,2012
Online ISSN: 1459-0263
Print ISSN: 1459-0255
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Stomatal characteristics of greening plant species in response to different urban atmospheric environments in Xi’an, China
Author(s):
Huixia Wang,
Hui Shi *, Rongyun Yang, Jianhua Liu, Ya YuRecieved Date: 2012-05-20, Accepted Date: 2012-10-02
Abstract:The research involved the examination of variations in stomatal traits: stomatal density (SD), stomatal length (L) and width (W), guard cell length (Lg), stomatal pore surface (SPS), relative stomatal pore surface (RSPS), theoretical minimal stomatal resistance (Rs), stomatal shape coefficient (SSC) and potential conductance index (PCI) in Ligustrum lucidum and Ligustrum quihoui under different urban atmospheric environments. The changes in stomatal characteristics were measured at 22 locations in Xi’an (China), classified into four levels of pollution areas, i.e., comparatively pollution-free area (CPF), light pollution areas (LP), medium level pollution areas (MLP) and serious pollution areas (SP). SD, RSPS and PCI significantly increased from CPF towards more polluted areas (LP, MLP, SP), while the variations of L, W, SPS, Rs, SSC and Lg were dependent on plant species. L, Lg and Rs of Ligustrum lucidum increased in polluted areas (LP, MLP, SP) in comparison with CPF, whereas the reverse trends were observed for Ligustrum quihoui. Decreases in W, SSC and SPS of Ligustrum lucidum were observed in parallel with the increasing degree of pollution. However, Ligustrum quihoui showed the reverse trends. The changes of stomatal characteristics under different urban atmospheric environments and different plantspecies showed diversely adaptive abilities. An increase in stomatal density leads to an optimal adjustment for control of gas exchange in general and the entrance of pollutants through stomata in particular. Therefore, stomatal characteristics, especially SD, RSPS and PCI, are assumed to be potentially good bioindicators for urban habitat quality.
Keywords:Air pollution,
stomatal characteristics, leaf anatomy, biomonitoringJournal: Journal of Food, Agriculture and Environment
Year: 2012
Volume: 10
Issue: 3&4
Category: Environment
Pages: 1524-1529
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