About: 24-Epibrassinolide and 20-hydroxyecdysone affect photosynthesis differently in maize and spinach     Goto   Sponge   NotDistinct   Permalink

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Description
  • The aim of the work was to examine the effect of brassinosteroid (24-epibrassinolide; 24E) and ecdysteroid (20-hydroxyecdysone; 20E) on various parts of primary photosynthetic processes in maize and spinach. Additionally, the effect of steroids on gaseous exchange, pigment content and biomass accumulation was studied. The efficiency of the photosynthetic whole electron-transport chain responded negatively to the 24E or 20E treatment in both species, but there were interspecific differences regarding Photosystem (PS) II response. A positive effect on its oxygen-evolving complex and a slightly better energetical connectivity between PSII units were observed in maize whereas the opposite was true for spinach. The size of the pool of the PSI end electron acceptors was usually diminished due to 24E or 20E treatment. The treatment of plants with 24E or 20E applied individually positively influenced the content of photosynthetic pigments in maize (not in spinach). On the other hand, it did not affect gaseous exchange in maize but resulted in its reduction in spinach. Plants treated with combination of both steroids mostly did not significantly differ from the control plants. We have demonstrated for the first time that 20E applied in low (10 nM) concentration can affect various parts of photosynthetic processes similarly to 24E and that brassinosteroids regulate not only PSII but also other parts of the photosynthetic electron transport chain - but not necessarily in the same way.
  • The aim of the work was to examine the effect of brassinosteroid (24-epibrassinolide; 24E) and ecdysteroid (20-hydroxyecdysone; 20E) on various parts of primary photosynthetic processes in maize and spinach. Additionally, the effect of steroids on gaseous exchange, pigment content and biomass accumulation was studied. The efficiency of the photosynthetic whole electron-transport chain responded negatively to the 24E or 20E treatment in both species, but there were interspecific differences regarding Photosystem (PS) II response. A positive effect on its oxygen-evolving complex and a slightly better energetical connectivity between PSII units were observed in maize whereas the opposite was true for spinach. The size of the pool of the PSI end electron acceptors was usually diminished due to 24E or 20E treatment. The treatment of plants with 24E or 20E applied individually positively influenced the content of photosynthetic pigments in maize (not in spinach). On the other hand, it did not affect gaseous exchange in maize but resulted in its reduction in spinach. Plants treated with combination of both steroids mostly did not significantly differ from the control plants. We have demonstrated for the first time that 20E applied in low (10 nM) concentration can affect various parts of photosynthetic processes similarly to 24E and that brassinosteroids regulate not only PSII but also other parts of the photosynthetic electron transport chain - but not necessarily in the same way. (en)
Title
  • 24-Epibrassinolide and 20-hydroxyecdysone affect photosynthesis differently in maize and spinach
  • 24-Epibrassinolide and 20-hydroxyecdysone affect photosynthesis differently in maize and spinach (en)
skos:prefLabel
  • 24-Epibrassinolide and 20-hydroxyecdysone affect photosynthesis differently in maize and spinach
  • 24-Epibrassinolide and 20-hydroxyecdysone affect photosynthesis differently in maize and spinach (en)
skos:notation
  • RIV/00216208:11310/14:10218326!RIV15-MSM-11310___
http://linked.open...avai/riv/aktivita
http://linked.open...avai/riv/aktivity
  • I, P(GAP501/11/1650), S, Z(MSM0021620858)
http://linked.open...iv/cisloPeriodika
  • JUL 2014
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
  • 58182
http://linked.open...ai/riv/idVysledku
  • RIV/00216208:11310/14:10218326
http://linked.open...riv/jazykVysledku
http://linked.open.../riv/klicovaSlova
  • Photosynthetic electron transport; OJIP analysis; Gas exchange; Chlorophyll; Brassinosteroids; Ecdysteroids (en)
http://linked.open.../riv/klicoveSlovo
http://linked.open...odStatuVydavatele
  • US - Spojené státy americké
http://linked.open...ontrolniKodProRIV
  • [BC6687C3F651]
http://linked.open...i/riv/nazevZdroje
  • Steroids
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...v/svazekPeriodika
  • 85
http://linked.open...iv/tvurceVysledku
  • Hnilička, František
  • Holá, Dana
  • Macek, Tomáš
  • Kočová, Marie
  • Tůmová, Lenka
  • Hniličková, Helena
  • Rothová, Olga
  • Kamlar, Marek
http://linked.open...ain/vavai/riv/wos
  • 000337652700007
http://linked.open...n/vavai/riv/zamer
issn
  • 0039-128X
number of pages
http://bibframe.org/vocab/doi
  • 10.1016/j.steroids.2014.04.006
http://localhost/t...ganizacniJednotka
  • 11310
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