<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="6.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Ghannoum, O.</style></author><author><style face="normal" font="default" size="100%">Conroy, J. P.</style></author><author><style face="normal" font="default" size="100%">Driscoll, S. P.</style></author><author><style face="normal" font="default" size="100%">Paul, M. J.</style></author><author><style face="normal" font="default" size="100%">Foyer, C. H.</style></author><author><style face="normal" font="default" size="100%">Lawlor, D. W.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Nonstomatal limitations are responsible for drought-induced photosynthetic inhibition in four C-4 grasses</style></title><secondary-title><style face="normal" font="default" size="100%">New Phytologist</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">and metabolic inhibition</style></keyword><keyword><style  face="normal" font="default" size="100%">atmospheric</style></keyword><keyword><style  face="normal" font="default" size="100%">bisphosphate carboxylase activity</style></keyword><keyword><style  face="normal" font="default" size="100%">C-4 photosynthesis</style></keyword><keyword><style  face="normal" font="default" size="100%">carbon assimilation</style></keyword><keyword><style  face="normal" font="default" size="100%">chla fluorescence</style></keyword><keyword><style  face="normal" font="default" size="100%">co2</style></keyword><keyword><style  face="normal" font="default" size="100%">co2 assimilation</style></keyword><keyword><style  face="normal" font="default" size="100%">drought</style></keyword><keyword><style  face="normal" font="default" size="100%">electron-transport</style></keyword><keyword><style  face="normal" font="default" size="100%">growth-response</style></keyword><keyword><style  face="normal" font="default" size="100%">leaves</style></keyword><keyword><style  face="normal" font="default" size="100%">mild water-stress</style></keyword><keyword><style  face="normal" font="default" size="100%">O-2 evolution</style></keyword><keyword><style  face="normal" font="default" size="100%">panicum</style></keyword><keyword><style  face="normal" font="default" size="100%">plants</style></keyword><keyword><style  face="normal" font="default" size="100%">stomatal</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2003</style></year><pub-dates><date><style  face="normal" font="default" size="100%">Sep</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">&lt;Go to ISI&gt;://000184616400008</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">159</style></volume><pages><style face="normal" font="default" size="100%">599-608</style></pages><isbn><style face="normal" font="default" size="100%">0028-646X</style></isbn><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">Here, the contribution of stomatal and nonstomatal factors to photosynthetic inhibition under water stress in four tropical C-4 grasses was investigated (Panicum coloratum, Bothriochloa bladhii, Cenchrus ciliaris and Astrebla lappacea ). Plants were grown in well watered soil, and then the effects of soil drying were measured on leaf gas exchange, chlorophyll a fluorescence and water relations. During the drying cycle, leaf water potential (Psi(leaf)) and relative water content (RWC) decreased from c. -0.4 to -2.8 MPa and 100-40%, respectively. The CO2 assimilation rates (A) and quantum yield of PSII (Phi(PSII)) of all four grasses decreased rapidly with declining RWC. High CO2 concentration (2500 mul l(-1)) had no effect on A or Phi(PSII) at any stage of the drying cycle. Electron transport capacity and dark respiration rates were unaltered by drought. The CO2 compensation concentrations of P. coloratum and C. ciliaris rose sharply when leaf RWC fell below 70%. In P. coloratum, 5% CO2 did not prevent the decline of O-2 evolution rates under water stress. We conclude that inhibition of photosynthesis in the four C-4 grasses under water stress is dependent mainly on biochemical limitations.</style></abstract><work-type><style face="normal" font="default" size="100%">Article</style></work-type><accession-num><style face="normal" font="default" size="100%">ISI:000184616400008</style></accession-num><notes><style face="normal" font="default" size="100%">ISI Document Delivery No.: 709GATimes Cited: 17Cited Reference Count: 49Cited References: CASTRILLO M, 2001, PHOTOSYNTHETICA, V39, P221 CONTOURANSEL D, 1996, J AGRON CROP SCI, V176, P59 CORNIC G, 1994, PHOTOINHIBITION PHOT, P297 CORNIC G, 2000, TRENDS PLANT SCI, V5, P187 COWAN IR, 1981, BIOL AUSTR PLANTS, P1 DU YC, 1996, AUST J PLANT PHYSIOL, V23, P719 EHLERINGER JR, 1997, OECOLOGIA, V112, P285 FARQUHAR GD, 1980, PLANTA, V149, P78 FOYER CH, 1998, PLANT PHYSIOL, V117, P283 GENTY B, 1989, BIOCHIM BIOPHYS ACTA, V990, P87 GHANNOUM O, 1997, AUST J PLANT PHYSIOL, V24, P227 GHANNOUM O, 1998, AUST J PLANT PHYSIOL, V25, P627 GHANNOUM O, 1998, PLANT CELL ENVIRON, V21, P1123 GHANNOUM O, 2000, PLANT CELL ENVIRON, V23, P931 GHANNOUM O, 2002, FUNCT PLANT BIOL, V29, P1337, DOI 10.1071/FP02056 GIMENEZ C, 1992, PLANT PHYSIOL, V98, P516 HATCH MD, 1987, BIOCHIM BIOPHYS ACTA, V895, P81 HATTERSLEY PW, 1992, DESERTIFIED GRASSLAN, P181 JONES MM, 1978, PLANT PHYSIOL, V61, P122 KAWAMITSU Y, 1993, PLANT CELL PHYSIOL, V34, P113 KOBAYASHI T, 2000, ECOL RES, V15, P165 KRAMER PJ, 1995, WATER RELATIONS PLAN, P313 LAL A, 1996, AUST J PLANT PHYSIOL, V23, P403 LAWLOR DW, 1978, J EXP BOT, V29, P579 LAWLOR DW, 1989, J EXP BOT, V40, P43 LAWLOR DW, 1995, ENV PLANT METABOLISM, P129 LAWLOR DW, 2002, PLANT CELL ENVIRON, V25, P275 LONG S, 1999, BIOL C4 PLANTS, P215 LORETO F, 1995, AUST J PLANT PHYSIOL, V22, P885 MASSACCI A, 1996, AUST J PLANT PHYSIOL, V23, P331 MCKEON GM, 1990, J BIOGEOGR, V17, P355 MCKEON GM, 1998, RANGELAND J, V20, P151 MEYER S, 1999, PLANTA, V210, P126 MORGAN JA, 1980, PLANT PHYSIOL, V65, P156 ORTIZLOPEZ A, 1991, PLANT PHYSIOL, V96, P1016 OSMOND CB, 1982, PHYSL PLANT ECOLOGY, V2, P479 SACCARDY K, 1996, PLANTA, V199, P589 SALIENDRA NZ, 1996, J EXP BOT, V47, P907 SENEWEERA S, 2001, AUST J PLANT PHYSIOL, V28, P451 SHARKEY TD, 1989, PLANT PHYSIOL, V89, P1060 SINCLAIR TR, 1985, AUST J PLANT PHYSIOL, V12, P213 STUHLFAUTH T, 1990, PLANT PHYSIOL, V92, P1053 TEZARA W, 1999, NATURE, V401, P914 VANKOOTEN O, 1990, PHOTOSYNTH RES, V25, P146 VASSEY TL, 1989, PLANT PHYSIOL, V89, P1066 VONCAEMMERER S, 1999, C4 PLANT BIOL, P173 VONCAEMMERER S, 2000, BIOCH MODELS LEAF PH WALKER DA, 1987, USE OXYGEN ELECTRODE WILLIAMS K, 2001, CURR DRUG TARGETS, V2, P285Blackwell publishing ltdOxford</style></notes></record></records></xml>