Limits...
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.

Show MeSH

Related in: MedlinePlus

Comparison of soluble sugar (a) and proline (b) in leaves from nine selected C. dactylon accessions in response to SO2 stress. Mean values are presented with vertical error bars representing the standard deviations (n = 3). The asterisk symbols indicate significant differences between SO2-sensitive accessions and SO2-tolerant accessions.
© Copyright Policy - open-access
Related In: Results  -  Collection


getmorefigures.php?uid=PMC4109121&req=5

fig3: Comparison of soluble sugar (a) and proline (b) in leaves from nine selected C. dactylon accessions in response to SO2 stress. Mean values are presented with vertical error bars representing the standard deviations (n = 3). The asterisk symbols indicate significant differences between SO2-sensitive accessions and SO2-tolerant accessions.

Mentions: The soluble sugar and proline contents in leaves from all of the nine C. dactylon accessions increased along with the increase of their SO2 tolerability (Figure 3). Moreover, the soluble sugar and proline contents from all of the high SO2-tolerant C. dactylon accessions and intermediate SO2-tolerant C. dactylon accessions were significantly higher than those from any of the three SO2-sensitive C. dactylon accessions at both 0-day time-point without SO2 treatment and 7-day time-point after SO2 fumigation treatment. However, the soluble sugar and proline contents from 7-day time-point after SO2 fumigation treatment showed no significant change when they were compared with those from 0-day time-point in any C. dactylon accession, which indicates that both soluble sugar and proline are not induced or inhibited in C. dactylon under SO2 stress condition (Figure 3).


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)

Comparison of soluble sugar (a) and proline (b) in leaves from nine selected C. dactylon accessions in response to SO2 stress. Mean values are presented with vertical error bars representing the standard deviations (n = 3). The asterisk symbols indicate significant differences between SO2-sensitive accessions and SO2-tolerant accessions.
© Copyright Policy - open-access
Related In: Results  -  Collection

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

fig3: Comparison of soluble sugar (a) and proline (b) in leaves from nine selected C. dactylon accessions in response to SO2 stress. Mean values are presented with vertical error bars representing the standard deviations (n = 3). The asterisk symbols indicate significant differences between SO2-sensitive accessions and SO2-tolerant accessions.
Mentions: The soluble sugar and proline contents in leaves from all of the nine C. dactylon accessions increased along with the increase of their SO2 tolerability (Figure 3). Moreover, the soluble sugar and proline contents from all of the high SO2-tolerant C. dactylon accessions and intermediate SO2-tolerant C. dactylon accessions were significantly higher than those from any of the three SO2-sensitive C. dactylon accessions at both 0-day time-point without SO2 treatment and 7-day time-point after SO2 fumigation treatment. However, the soluble sugar and proline contents from 7-day time-point after SO2 fumigation treatment showed no significant change when they were compared with those from 0-day time-point in any C. dactylon accession, which indicates that both soluble sugar and proline are not induced or inhibited in C. dactylon under SO2 stress condition (Figure 3).

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