EurekaMag.com logo
+ Site Statistics
References:
53,869,633
Abstracts:
29,686,251
+ Search Articles
+ Subscribe to Site Feeds
EurekaMag Most Shared ContentMost Shared
EurekaMag PDF Full Text ContentPDF Full Text
+ PDF Full Text
Request PDF Full TextRequest PDF Full Text
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter
Follow on LinkedInFollow on LinkedIn

+ Translate

Active oxygen damage effect of chlorophyll degradation in rice seedlings under osmotic stress



Active oxygen damage effect of chlorophyll degradation in rice seedlings under osmotic stress



Acta Botanica Sinica 36(4): 289-295



The changes of chlorophyll (Chl) content and contents of protochlorophyllide (Pchl), superoxide radical (O-2.-) and hydrogen peroxide (H-2O-2), malondialdehyde (MDA), ascorbic acid (AsA), glutathione (GSH), carotenoid (CAR) and the binding capacity of chlorophyll-protein (Chl-Pro) in rice (Oryza sativa L. ) seedlings exposed to osmotic stress induced by PEG 6000 (-0.5 MPa, -0.8 MPa) were investigated to explore the relationship between Chl degradation and active oxygen effect. Under osmotic stress, Chl degradation was accompanied by the increase of contents of O-2.-, H-2O-2 and MDA and the decrease of contents of antioxidants AsA, GSH and CAR. The binding of Chl-Pro was loosened with the change of time and intensity of osmotic stress. Pretreatment with scavengers for active oxygen, such as AsA, alpha-tocopherol and mannitol retarded lipid peroxidation and reduced the oxidative injury of Chi, but Fe-2+, H-2O-2 and Fenton reaction promoted the formation of MDA. The Fenton reaction accelerated the degradation of Chl. The results indicate that Chl degradation in rice seedlings induced by osmotic stress may be mainly due to the formation of more active hydroxyl radicals (.OH) through Fenton reaction and Haber-Weiss reaction.

(PDF emailed within 1 workday: $29.90)

Accession: 002558125

Download citation: RISBibTeXText



Related references

Damage effect of monocrotophos on Platymonas sp.: II. Relationship between chlorophyll: A degradation and active oxygen. Yingyong Shengtai Xuebao 9(6): 631-634, 1998

Membrane lipid peroxidation damage effect of chlorophyll degradation in Malus seedlings under water stress. Scientia Agricultura Sinica 36(10): 1191-1195, 2003

Effect of exogenous polyamines on glycolate oxidase activity and active oxygen species accumulation in wheat seedlings under osmotic stress. Israel Journal of Plant Sciences 49(3): 173-178, 2001

The damage to rice seedlings under high oxygen concentration and protective enzymes of active oxygen. Acta Botanica Austro Sinica 4: 169-176, 1989

A quantitative analysis on the effects of osmotic stress on active oxygen damage in varieties of peanut. Journal of Plant Resources and Environment 10(2): 14-20, 2001

The effects of NaCl stress on plant growth, chlorophyll fluorescence characteristics and active oxygen metabolism in seedlings of two cucumber cultivars. Scientia Agricultura Sinica 37(11): 1754-1759, 2004

Effects of NaCl stress on Hovenia dulcis and Gleditsia sinensis seedlings growth, chlorophyll fluorescence, and active oxygen metabolism. Ying Yong Sheng Tai Xue Bao 19(11): 2503-2508, 2009

Effects of osmotic stress on active oxygen damage and membrane peroxidation in young leaves of groundnut (Arachis hypogaea). Chinese Journal of Oil Crop Sciences 22(1): 53-56, 2000

Effects of Cd stress on biomass accumulation and active oxygen metabolism of rice seedlings and their genotype difference. Acta Agriculturae Zhejiangensis 17(3): 147-150, 2005

Effect of whorl maggot damage on the contents of chlorophyll and reduced sugars and uptake of nutrients in rice seedlings. Madras Agricultural Journal 64(6): 405-406, 1977

Relationship between active oxygen damage and tonoplast H+-ATPase activity in leaves of barley seedlings under salt stress. Journal of Nanjing Agricultural University 21(3): 21-25, 1998

Root osmotic adjustment under osmotic stress in maize seedlings. 1. Transient change of growth and water relations in roots in response to osmotic stress. Plant Production Science 9(1): 27-38, 2006

Effect of La (lanthanum) on photosynthesis and active oxygen metabolism of soyabean seedlings under Cd stress. Chinese Journal of Oil Crop Sciences 28(2): 166-171, 2006

Osmotic stress-induced oxidative injury of rice seedlings. Acta Agronomica Sinica 20(6): 733-738, 1994