Effects of different nitrogen forms on photosynthetic rate and the chlorophyll fluorescence induction kinetics of flue-cured tobacco

Title:

Effects of different nitrogen forms on photosynthetic rate and the chlorophyll fluorescence induction kinetics of flue-cured tobacco

Creator:

Guo, H. X., Liu, W. Q., and Shi, Y. C.

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:80e56047-5cab-4e78-97a5-d618421bfe71
uuid:80e56047-5cab-4e78-97a5-d618421bfe71
issn:0300-3604
doi:10.1007/s11099-005-0170-3

Subject:

actual quantum yield of PS2, Nicotiana, photochemical and non-photochemical quenching, and photosystem 2

Type:

model:article and TEXT

Format:

bez média and svazek

Description:

Net photosynthetic rate (PN) of tobacco plants grown with NH4-N as the only N source was the lowest all the times, while PN grown only with NO3-N was the greatest until 22nd day, and PN grown with both NO3-N and NH4-N (1 : 1) was the greatest. Maximal photochemical efficiency of photosystem 2 (PS2), Fv/Fm, and actual quantum yield of PS2 under actinic irradiation (ΦPS2) in plants grown with only NH4-N were greatest at early stage and then decreased and were smaller than those of other treatments. Photochemical quenching coefficient (qP) and non-photochemical quenching coefficient (qNP) in the NH4-N plants were the greatest at all times. Hence excessive NH4-N can decrease not only photochemical efficiency but also the efficiency of utilization of photon energy absorbed by pigments for photosynthesis. Therefore, excessive NH4-N is a hindrance to photosynthesis of flue-cured tobacco. On the other hand, tobacco cultured with an appropriate mixture of NO3-N with NH4-N can sufficiently utilize photon energy and increase the efficiency of energy transformation. and H. X. Guo, W. Q. Liu, Y. C. Shi.

Language:

Multiple languages

Rights:

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

Coverage:

140-142

Source:

Photosynthetica | 2006 Volume:44 | Number:1

Harvested from:

CDK

Metadata only:

false