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Comparative analyses of physiological responses of Cynodon dactylon accessions from Southwest China to sulfur dioxide toxicity.

Li X, Wang L, Li Y, Sun L, Cai S, Huang Z - ScientificWorldJournal (2014)

Bottom Line: To achieve better air quality and landscape, planting appropriate grass species in severe SO2 polluted areas is very critical.Cynodon dactylon, a widely used warm season turfgrass species, has good SO2-tolerant ability.Taken together, our results indicated that SO2 tolerance of C. dactylon might be largely related to soluble sugar, proline and chlorophyll a contents, and SO enzyme activity.

View Article: PubMed Central - PubMed

Affiliation: College of Landscape Architecture, Sichuan Agricultural University, No. 211 Huimin Road, Wenjiang, Sichuan 611130, China.

ABSTRACT
Sulfur dioxide (SO2), a major air pollutant in developing countries, is highly toxic to plants. To achieve better air quality and landscape, planting appropriate grass species in severe SO2 polluted areas is very critical. Cynodon dactylon, a widely used warm season turfgrass species, has good SO2-tolerant ability. In this study, we selected 9 out of 38 C. dactylon accessions from Southwest China as representatives of high, intermediate SO2-tolerant and SO2-sensitive accessions to comparatively analyze their physiological differences in leaves under SO2 untreated and treated conditions. Our results revealed that SO2-tolerant C. dactylon accessions showed higher soluble sugar, proline, and chlorophyll a contents under both SO2 treated and untreated conditions; higher chlorophyll b and carotenoid under SO2 treated condition; lower reactive oxygen species (ROS) level, oxidative damages, and superoxide dismutase (SOD) activities under SO2 treated condition; and higher peroxidase (POD) activities under SO2 untreated condition. Further results indicated that SO2-tolerant C. dactylon accessions had higher sulfur contents under both SO2 treated and untreated conditions, consistent with higher SO activities under both SO2 treated and untreated conditions, and higher SiR activities under SO2 treated condition. Taken together, our results indicated that SO2 tolerance of C. dactylon might be largely related to soluble sugar, proline and chlorophyll a contents, and SO enzyme activity.

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Related in: MedlinePlus

The collection sites of the 38 samples of wild C. dactylon in Southwest China. Provinces where samples were collected are illustrated with number of C. dactylon accessions in parentheses underneath in map.
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Related In: Results  -  Collection


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fig1: The collection sites of the 38 samples of wild C. dactylon in Southwest China. Provinces where samples were collected are illustrated with number of C. dactylon accessions in parentheses underneath in map.

Mentions: Thirty-eight wild C. dactylon accessions used in this study were sampled from Sichuan Province, Chongqing municipality, Yunnan Province, Guizhou Province, and Tibet Autonomous Region in Southwestern China between years 2011 and 2012. A complete list of accession descriptions and geographical origins was provided in Table 1 and Figure 1. The wild C. dactylon accessions were collected originally from roadside, riverside, floodland, fieldridge, wasteland, hillside, or city park. All wild accessions used in this study were determined to be C. dactylon based on morphological characteristics as described by Harlan [14].


Comparative analyses of physiological responses of Cynodon dactylon accessions from Southwest China to sulfur dioxide toxicity.

Li X, Wang L, Li Y, Sun L, Cai S, Huang Z - ScientificWorldJournal (2014)

The collection sites of the 38 samples of wild C. dactylon in Southwest China. Provinces where samples were collected are illustrated with number of C. dactylon accessions in parentheses underneath in map.
© Copyright Policy - open-access
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC4109121&req=5

fig1: The collection sites of the 38 samples of wild C. dactylon in Southwest China. Provinces where samples were collected are illustrated with number of C. dactylon accessions in parentheses underneath in map.
Mentions: Thirty-eight wild C. dactylon accessions used in this study were sampled from Sichuan Province, Chongqing municipality, Yunnan Province, Guizhou Province, and Tibet Autonomous Region in Southwestern China between years 2011 and 2012. A complete list of accession descriptions and geographical origins was provided in Table 1 and Figure 1. The wild C. dactylon accessions were collected originally from roadside, riverside, floodland, fieldridge, wasteland, hillside, or city park. All wild accessions used in this study were determined to be C. dactylon based on morphological characteristics as described by Harlan [14].

Bottom Line: To achieve better air quality and landscape, planting appropriate grass species in severe SO2 polluted areas is very critical.Cynodon dactylon, a widely used warm season turfgrass species, has good SO2-tolerant ability.Taken together, our results indicated that SO2 tolerance of C. dactylon might be largely related to soluble sugar, proline and chlorophyll a contents, and SO enzyme activity.

View Article: PubMed Central - PubMed

Affiliation: College of Landscape Architecture, Sichuan Agricultural University, No. 211 Huimin Road, Wenjiang, Sichuan 611130, China.

ABSTRACT
Sulfur dioxide (SO2), a major air pollutant in developing countries, is highly toxic to plants. To achieve better air quality and landscape, planting appropriate grass species in severe SO2 polluted areas is very critical. Cynodon dactylon, a widely used warm season turfgrass species, has good SO2-tolerant ability. In this study, we selected 9 out of 38 C. dactylon accessions from Southwest China as representatives of high, intermediate SO2-tolerant and SO2-sensitive accessions to comparatively analyze their physiological differences in leaves under SO2 untreated and treated conditions. Our results revealed that SO2-tolerant C. dactylon accessions showed higher soluble sugar, proline, and chlorophyll a contents under both SO2 treated and untreated conditions; higher chlorophyll b and carotenoid under SO2 treated condition; lower reactive oxygen species (ROS) level, oxidative damages, and superoxide dismutase (SOD) activities under SO2 treated condition; and higher peroxidase (POD) activities under SO2 untreated condition. Further results indicated that SO2-tolerant C. dactylon accessions had higher sulfur contents under both SO2 treated and untreated conditions, consistent with higher SO activities under both SO2 treated and untreated conditions, and higher SiR activities under SO2 treated condition. Taken together, our results indicated that SO2 tolerance of C. dactylon might be largely related to soluble sugar, proline and chlorophyll a contents, and SO enzyme activity.

Show MeSH
Related in: MedlinePlus