Influence of low phosphorus concentration on leaf photosynthetic characteristics and antioxidant response of rice genotypes

Title:

Influence of low phosphorus concentration on leaf photosynthetic characteristics and antioxidant response of rice genotypes

Creator:

Veronica, N., Subrahmanyam, D., Vishnu Kiran, T. , Yugandhar, P., Bhadana, V. P., Padma, V., Jayasree, G., and Voleti, S. R.

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:571bc091-6e38-42e6-bc0f-5c2ff50a294f
uuid:571bc091-6e38-42e6-bc0f-5c2ff50a294f
issn:0300-3604
doi:10.1007/s11099-016-0640-4

Subject:

antioxidanty, rýže, antioxidants, rice, fluorescence chlorofylu, výměna plynu, nedostatek fosforu, chlorophyll fluorescence, gas exchange, phosphorus deficiency, 2, and 581

Type:

model:article and TEXT

Format:

print, bez média, and svazek

Description:

Influence of different phosphorus concentrations was studied in four rice varieties (Akhanphou, MTU1010, RP BIO 226, and Swarna) differing in their tolerance to low phosphorus. There was an increase in shoot and root dry mass with the increase in phosphorus concentration. At the low phosphorus concentration at both tillering and reproductive stages, Swarna, followed by Akhanphou, recorded maximum biomass for both roots and shoots, while the minimum was observed in RP BIO 226. Reduction in photosynthetic rate, stomatal conductance, transpiration rate, and internal CO2 concentration at low phosphorus concentrations were observed at both tillering and reproductive stages in all the genotypes. In low phosphorus, maximum photosynthetic rate was found in Swarna followed by Akhanphou. Phosphorus deficiency did not alter the maximum efficiency of PSII photochemistry, however, there was a reduction in effective PSII quantum yield, electron transport rate, and coefficient of photochemical quenching, while the coefficient of nonphotochemical quenching was higher in the low phosphorus-treated plants. Prolonged exposure to excessive energy and failure to utilize the energy in carbon-reduction cycle induced the generation of reactive oxygen species, which affected PSII as indicated by the fluorescence traits. The reduction was less severe in case of Swarna and Akhanphou. The activities of superoxide dismutase, peroxidase, and catalase increased in roots under low phosphorus concentration indicating that photoprotective mechanisms have been initiated in rice plants in response to phosphorus deficiency. Comparatively, Swarna and Akhanphou exhibited a higher biomass, higher photosynthetic rate, and better reactive oxygen species-scavenging ability which conferred tolerance under low phosphorus conditions., N. Veronica, D. Subrahmanyam, T. Vishnu Kiran, P. Yugandhar, V. P. Bhadana, V. Padma, G. Jayasree, S. R. Voleti., and Obsahuje bibliografii

Language:

Multiple languages

Rights:

http://creativecommons.org/licenses/by-nc-sa/4.0/
policy:public

Coverage:

285-293

Source:

Photosynthetica | 2017 Volume:55 | Number:2

Harvested from:

CDK

Metadata only:

false