Leaf gas films contribute to rice (Oryza sativa) submergence tolerance during saline floods
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Leaf gas films contribute to rice (Oryza sativa) submergence tolerance during saline floods. / Herzog, Max; Konnerup, Dennis; Pedersen, Ole; Winkel, Anders; Colmer, Timothy David.
I: Plant, Cell and Environment, Bind 41, Nr. 5, 2018, s. 885-897.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
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TY - JOUR
T1 - Leaf gas films contribute to rice (Oryza sativa) submergence tolerance during saline floods
AU - Herzog, Max
AU - Konnerup, Dennis
AU - Pedersen, Ole
AU - Winkel, Anders
AU - Colmer, Timothy David
N1 - © 2016 John Wiley & Sons Ltd.
PY - 2018
Y1 - 2018
N2 - Floods and salinization of agricultural land adversely impact global rice production. We investigated whether gas films on leaves of submerged rice delay salt entry during saline submergence. Two-week-old plants with leaf gas films (+GF) or with gas films experimentally removed (-GF) were submerged in artificial floodwater with 0 or 50 mm NaCl for up to 16 d. Gas films were present >9 d on GF plants after which gas films were diminished. Tissue ion analysis (Na(+) , Cl(-) and K(+) ) showed that gas films caused some delay of Na(+) entry, as leaf Na(+) concentration was 36-42% higher in -GF leaves than +GF leaves on days 1-5. However, significant net uptakes of Na(+) and Cl(-) , and K(+) net loss, occurred despite the presence of gas films, indicating the likely presence of some leaf-to-floodwater contact, so that the gas layer must not have completely separated the leaf surfaces from the water. Natural loss and removal of gas films resulted in severe declines in growth, underwater photosynthesis, chlorophylla and tissue porosity. Submergence was more detrimental to leaf PN and growth than the additional effect of 50 mm NaCl, as salt did not significantly affect underwater PN at 200 μm CO2 nor growth.
AB - Floods and salinization of agricultural land adversely impact global rice production. We investigated whether gas films on leaves of submerged rice delay salt entry during saline submergence. Two-week-old plants with leaf gas films (+GF) or with gas films experimentally removed (-GF) were submerged in artificial floodwater with 0 or 50 mm NaCl for up to 16 d. Gas films were present >9 d on GF plants after which gas films were diminished. Tissue ion analysis (Na(+) , Cl(-) and K(+) ) showed that gas films caused some delay of Na(+) entry, as leaf Na(+) concentration was 36-42% higher in -GF leaves than +GF leaves on days 1-5. However, significant net uptakes of Na(+) and Cl(-) , and K(+) net loss, occurred despite the presence of gas films, indicating the likely presence of some leaf-to-floodwater contact, so that the gas layer must not have completely separated the leaf surfaces from the water. Natural loss and removal of gas films resulted in severe declines in growth, underwater photosynthesis, chlorophylla and tissue porosity. Submergence was more detrimental to leaf PN and growth than the additional effect of 50 mm NaCl, as salt did not significantly affect underwater PN at 200 μm CO2 nor growth.
KW - Journal Article
U2 - 10.1111/pce.12873
DO - 10.1111/pce.12873
M3 - Journal article
C2 - 27925226
VL - 41
SP - 885
EP - 897
JO - Plant, Cell and Environment
JF - Plant, Cell and Environment
SN - 0140-7791
IS - 5
ER -
ID: 173879523