caa a22 4500 445841397 CHVBK 20180317145345.0 cr unu---uuuuu 170323e20110401xx s 000 0 eng 10.1007/s10725-010-9520-7 doi (NATIONALLICENCE)springer-10.1007/s10725-010-9520-7 Partial nitrate nutrition amends photosynthetic characteristics in rice ( Oryza sativa L. var. japonica ) differing in nitrogen use efficiency [Elektronische Daten] [Yali Zhang, Huajun Lv, Dongsheng Wang, Jingchao Deng, Wenjing Song, Kousar Makeen, Qirong Shen, Guohua Xu] Partial nitrate nutrition (PNN) was found to improve rice (Oryza sativa L. var. japonica) growth. However, how PNN is related to photosynthesis in rice cultivars with different nitrogen use efficiency (NUE) is still not clear. Two rice cultivars, Nanguang (high NUE) and Elio (low NUE), were grown under sole NH4 + and PNN at a total nitrogen concentration of 2.86mM. The dry weight, leaf area, ribulose-1,5-bisphosphate carboxylase/oxygenase (Rubisco) and gas exchange parameters were measured. Nitrogen and Rubisco contents in the newly expanded leaves of cv. Nanguang were similar to those of cv. Elio when only NH4 + was supplemented in the nutrient solution. However, in cv. Nanguang, nitrogen and Rubisco contents increased under PNN than under sole NH4 + nutrition. Higher nitrogen and Rubisco contents were recorded in cv. Nanguang than in cv. Elio under PNN. The ratio of carboxylation efficiency (CE) to Rubisco content in cv. Nanguang was 11 and 14% higher than that in cv. Elio under NH4 + and PNN, respectively. CE was 14% higher in cv. Nanguang than that in cv. Elio. The results suggest that PNN causes an increase in photosynthesis in cv. Nanguang. It is concluded that differences in Rubisco activity, rather than stomatal limitation, are responsible for the differences in photosynthesis between the two cultivars. The presence of nitrate increases Rubisco content in rice with a high NUE, which leads to faster biomass accumulation at later growth stages. Springer Science+Business Media B.V., 2010 Carboxylation efficiency nationallicence Gas exchange parameter nationallicence Nitrogen nationallicence Partial nitrate nutrition nationallicence Rice nationallicence Rubisco nationallicence Stomatal limitation nationallicence A : CO2 assimilation rate nationallicence A max : Maximum photosynthetic rate nationallicence CE : Carboxylation efficiency nationallicence C i : Intercellular CO2 concentration nationallicence C o : Ambient CO2 concentration nationallicence g s : Stomatal conductance nationallicence g m : Leaf mesophyll conductance nationallicence K C : Michaelis-Menten constants for CO2 nationallicence K O : Michaelis-Menten constants for O2 nationallicence l : Stomatal limitation nationallicence NUE : Nitrogen use efficiency nationallicence O : Partial pressure of O2 nationallicence PNN : Partial nitrate nutrition nationallicence PPFD : Photosynthetic photon flux density nationallicence Tr : Transpiration rate nationallicence V c max : Maximum Rubisco carboxylation rate nationallicence α : Apparent quantum yield nationallicence Γ* : CO2 compensation point without dark respiration nationallicence Zhang Yali College of Resources and Environmental Sciences, Nanjing Agricultural University, 210095, Nanjing, China aut Lv Huajun College of Resources and Environmental Sciences, Nanjing Agricultural University, 210095, Nanjing, China aut Wang Dongsheng College of Resources and Environmental Sciences, Nanjing Agricultural University, 210095, Nanjing, China aut Deng Jingchao College of Resources and Environmental Sciences, Nanjing Agricultural University, 210095, Nanjing, China aut Song Wenjing College of Resources and Environmental Sciences, Nanjing Agricultural University, 210095, Nanjing, China aut Makeen Kousar College of Resources and Environmental Sciences, Nanjing Agricultural University, 210095, Nanjing, China aut Shen Qirong College of Resources and Environmental Sciences, Nanjing Agricultural University, 210095, Nanjing, China aut Xu Guohua College of Resources and Environmental Sciences, Nanjing Agricultural University, 210095, Nanjing, China aut Plant Growth Regulation Springer Netherlands 63/3(2011-04-01), 235-242 0167-6903 63:3<235 2011 63 10725 https://doi.org/10.1007/s10725-010-9520-7 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10725-010-9520-7 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Zhang Yali College of Resources and Environmental Sciences, Nanjing Agricultural University, 210095, Nanjing, China aut NATIONALLICENCE 700 1- Lv Huajun College of Resources and Environmental Sciences, Nanjing Agricultural University, 210095, Nanjing, China aut NATIONALLICENCE 700 1- Wang Dongsheng College of Resources and Environmental Sciences, Nanjing Agricultural University, 210095, Nanjing, China aut NATIONALLICENCE 700 1- Deng Jingchao College of Resources and Environmental Sciences, Nanjing Agricultural University, 210095, Nanjing, China aut NATIONALLICENCE 700 1- Song Wenjing College of Resources and Environmental Sciences, Nanjing Agricultural University, 210095, Nanjing, China aut NATIONALLICENCE 700 1- Makeen Kousar College of Resources and Environmental Sciences, Nanjing Agricultural University, 210095, Nanjing, China aut NATIONALLICENCE 700 1- Shen Qirong College of Resources and Environmental Sciences, Nanjing Agricultural University, 210095, Nanjing, China aut NATIONALLICENCE 700 1- Xu Guohua College of Resources and Environmental Sciences, Nanjing Agricultural University, 210095, Nanjing, China aut NATIONALLICENCE 773 0- Plant Growth Regulation Springer Netherlands 63/3(2011-04-01), 235-242 0167-6903 63:3<235 2011 63 10725 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer