title: Rice photosynthetic productivity and PSII photochemistry under nonflooded irrigation.
abstract: Nonflooded irrigation is an important water-saving rice cultivation technology, but little is known on its photosynthetic mechanism. The aims of this work were to investigate photosynthetic characteristics of rice during grain filling stage under three nonflooded irrigation treatments: furrow irrigation with plastic mulching (FIM), furrow irrigation with nonmulching (FIN), and drip irrigation with plastic mulching (DI). Compared with the conventional flooding (CF) treatment, those grown in the nonflooded irrigation treatments showed lower net photosynthetic rate (PN), lower maximum quantum yield (Fv/Fm), and lower effective quantum yield of PSII photochemistry (ΦPSII). And the poor photosynthetic characteristics in the nonflooded irrigation treatments were mainly attributed to the low total nitrogen content (TNC). Under non-flooded irrigation, the PN, Fv/Fm, and ΦPSII significantly decreased with a reduction in the soil water potential, but these parameters were rapidly recovered in the DI and FIM treatments when supplementary irrigation was applied. Moreover, The DI treatment always had higher photosynthetic productivity than the FIM and FIN treatments. Grain yield, matter translocation, and dry matter post-anthesis (DMPA) were the highest in the CF treatment, followed by the DI, FIM, and FIN treatments in turn. In conclusion, increasing nitrogen content in leaf of rice plants could be a key factor to improve photosynthetic capacity in nonflooded irrigation.
authors.affiliation: Agricultural College, Shihezi University/Key Laboratory of Oasis Ecology Agriculture of Xinjiang Bingtuan, Shihezi, Xinjiang 832003, China.
authors.forename: Haibing
authors.initials: H
authors.lastname: He
authors.affiliation: Agricultural College, Shihezi University/Key Laboratory of Oasis Ecology Agriculture of Xinjiang Bingtuan, Shihezi, Xinjiang 832003, China.
authors.forename: Ru
authors.initials: R
authors.lastname: Yang
authors.affiliation: Agricultural College, Shihezi University/Key Laboratory of Oasis Ecology Agriculture of Xinjiang Bingtuan, Shihezi, Xinjiang 832003, China.
authors.forename: Biao
authors.initials: B
authors.lastname: Jia
authors.affiliation: Agricultural Drought Research Institute of Tianye Group Company, XinJiang 832003, China.
authors.forename: Lin
authors.initials: L
authors.lastname: Chen
authors.affiliation: Agricultural College, Shihezi University/Key Laboratory of Oasis Ecology Agriculture of Xinjiang Bingtuan, Shihezi, Xinjiang 832003, China.
authors.forename: Hua
authors.initials: H
authors.lastname: Fan
authors.affiliation: Agricultural College, Shihezi University/Key Laboratory of Oasis Ecology Agriculture of Xinjiang Bingtuan, Shihezi, Xinjiang 832003, China.
authors.forename: Jing
authors.initials: J
authors.lastname: Cui
authors.affiliation: Agricultural College, Shihezi University/Key Laboratory of Oasis Ecology Agriculture of Xinjiang Bingtuan, Shihezi, Xinjiang 832003, China.
authors.forename: Dong
authors.initials: D
authors.lastname: Yang
authors.affiliation: Agricultural College, Shihezi University/Key Laboratory of Oasis Ecology Agriculture of Xinjiang Bingtuan, Shihezi, Xinjiang 832003, China.
authors.forename: Menglong
authors.initials: M
authors.lastname: Li
authors.affiliation: Agricultural College, Shihezi University/Key Laboratory of Oasis Ecology Agriculture of Xinjiang Bingtuan, Shihezi, Xinjiang 832003, China.
authors.forename: Fu-Yu
authors.initials: FY
authors.lastname: Ma
mesh_terms: D057914:Agricultural Irrigation; D000704:Analysis of Variance; D002734:Chlorophyll / Q000378:metabolism; D012275:Oryza / Q000502:physiology*; D010777:Photochemistry; D010788:Photosynthesis; D045332:Photosystem II Protein Complex / Q000378:metabolism*; D018515:Plant Leaves / Q000378:metabolism; D018517:Plant Roots / Q000502:physiology; D012987:Soil / Q000737:chemistry; D014867:Water
chemical_list: D045332:Photosystem II Protein Complex; D012987:Soil; C113691:photosystem II, PSII-X subunit; D014867:Water; D002734:Chlorophyll
references.citation: Annu Rev Plant Physiol Plant Mol Biol. 1997 Jun;48:223-250
references.pmid: 15012263
references.citation: Oecologia. 1989 Jan;78(1):9-19
references.pmid: 28311896
references.citation: Photosynth Res. 2002;73(1-3):149-56
references.pmid: 16245116
references.citation: Photosynth Res. 1990 Sep;25(3):173-85
references.pmid: 24420348
references.citation: J Exp Bot. 2000 Apr;51(345):659-68
references.pmid: 10938857
references.citation: Annu Rev Plant Biol. 2008;59:89-113
references.pmid: 18444897
references.citation: Plant Physiol. 1967 Oct;42(10):1423-6
references.pmid: 16656672
references.citation: Ann Bot. 2002 Feb;89(2):183-9
references.pmid: 12099349
references.citation: Plant Mol Biol. 1997 Sep;35(1-2):25-34
references.pmid: 9291957
references.citation: Plant Physiol Biochem. 2004 Jun;42(6):549-55
references.pmid: 15246069
references.citation: Photosynth Res. 1986 Jan;10(1-2):51-62
references.pmid: 24435276