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  • Although prolonged water stress can decrease Yleaf and close stomata via hydraulic influences, in many cases, plants use chemical signals travelling in the xylem to initiate stomatal closure thus preventing any decrease in Yleaf. Such signals can operate prior to any increase in bulk leaf hormone concentrations. Most interest has centred on ABA as the most probable root-to-shoot chemical signal regulating stomatal aperture. Apoplastic ABA concentration around the guard cells is crucial in determining stomatal responses, and this will depend on many factors including xylem ABA delivery to the leaf, leaf mesophyll ABA catabolism, leaf ABA synthesis and apoplastic pH. Even when apoplastic ABA concentration is constant, environmental and physiological variables such as CO2 concentration, temperature and current leaf water status can alter stomatal response to ABA. Other plant hormones are also important in modifying stomatal response to a given ABA concentration. The most probable candi...
  • Although prolonged water stress can decrease Yleaf and close stomata via hydraulic influences, in many cases, plants use chemical signals travelling in the xylem to initiate stomatal closure thus preventing any decrease in Yleaf. Such signals can operate prior to any increase in bulk leaf hormone concentrations. Most interest has centred on ABA as the most probable root-to-shoot chemical signal regulating stomatal aperture. Apoplastic ABA concentration around the guard cells is crucial in determining stomatal responses, and this will depend on many factors including xylem ABA delivery to the leaf, leaf mesophyll ABA catabolism, leaf ABA synthesis and apoplastic pH. Even when apoplastic ABA concentration is constant, environmental and physiological variables such as CO2 concentration, temperature and current leaf water status can alter stomatal response to ABA. Other plant hormones are also important in modifying stomatal response to a given ABA concentration. The most probable candi... (en)
  • Při vodním stresu průduchy reagují na hydraulické a chemické signály a změnou své otevřenosti regulují výměnu plynů. Nejznámějším chemickým signálem je kyselina abscisová (ABA). Pro reakci průduchů je důležitá její koncentrace uvnitř svěracích buněk a v apoplastu v nejbližším okolí průduchů. Tato koncentrace je určována transportem ABA z kořenů do nadzemní části, syntézou ABA v listu, katabolismem ABA a rychlostí transpirace. Ostatní rostlinné hormony mohou ovlivnit reakci průduchů na danou koncentraci ABA. Zatímco cytokininy a auxiny mohou zmírňovat působení ABA, jasmonáty mohou toto působení stimulovat. Ačkoliv byly pozorovány i nestomatální účinky fytohormonů na fotosyntetický aparát, většina účinků se soustřeďuje na vodivost průduchů a tím ovlivnění fotosyntézy díky změně vnitřní koncentrace oxidu uhličitého. Aplikace přírodních nebo syntetických regulátorů růstu může ovlivnit otevřenost průduchů a fotosyntézu, míra tohoto ovlivnění však závisí na příjmu a degradaci aplikované l... (cs)
Title
  • Role of plant growth regulators in stomatal limitation to photosynthesis during water stress
  • Úloha růstových regulátorů v průduchové limitaci fotosyntézy během vodního stresu (cs)
  • Role of plant growth regulators in stomatal limitation to photosynthesis during water stress (en)
skos:prefLabel
  • Role of plant growth regulators in stomatal limitation to photosynthesis during water stress
  • Úloha růstových regulátorů v průduchové limitaci fotosyntézy během vodního stresu (cs)
  • Role of plant growth regulators in stomatal limitation to photosynthesis during water stress (en)
skos:notation
  • RIV/61389030:_____/04:00000250!RIV/2005/AV0/A56005/N
http://linked.open.../vavai/riv/strany
  • 811;825
http://linked.open...avai/riv/aktivita
http://linked.open...avai/riv/aktivity
  • P(GA522/02/1099), Z(AV0Z5038910)
http://linked.open...vai/riv/dodaniDat
http://linked.open...aciTvurceVysledku
http://linked.open.../riv/druhVysledku
http://linked.open...iv/duvernostUdaju
http://linked.open...titaPredkladatele
http://linked.open...dnocenehoVysledku
  • 584988
http://linked.open...ai/riv/idVysledku
  • RIV/61389030:_____/04:00000250
http://linked.open...riv/jazykVysledku
http://linked.open.../riv/klicovaSlova
  • auxins; brasinosteroids; cytokinins (en)
http://linked.open.../riv/klicoveSlovo
http://linked.open...ontrolniKodProRIV
  • [1A87A3096CDB]
http://linked.open...i/riv/mistoVydani
  • New York
http://linked.open...i/riv/nazevZdroje
  • Handbook of Photosynthesis, Second Edition, Revised and Expanded
http://linked.open...in/vavai/riv/obor
http://linked.open...ichTvurcuVysledku
http://linked.open...cetTvurcuVysledku
http://linked.open...vavai/riv/projekt
http://linked.open...UplatneniVysledku
http://linked.open...iv/tvurceVysledku
  • Pospíšilová, Jana
  • Dodd, I. C.
http://linked.open...n/vavai/riv/zamer
number of pages
http://purl.org/ne...btex#hasPublisher
  • Marcel Dekker
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