Neighbour signals perceived by phytochrome B increase thermotolerance in Arabidopsis
Due to the preeminence of reductionist approaches, understanding of plant responses to combined stresses is limited.Wespeculated that light‐quality signals of neighbouring vegetation might increase susceptibility to heat shocks because shade reduces tissue temperature and hence the likeness of heat shocks. In contrast, plants of Arabidopsis thaliana grown under low‐red/far‐red ratios typical of shade were less damaged by heat stress than plants grown under simulated sunlight. Neighbour signals reduce the activity of phytochrome B (phyB), increasing the abundance of PHYTOCHROMEINTERACTING FACTORS (PIFs). The phyB mutant showed high tolerance to heat stress even under simulated sunlight, and a pif multiple mutant showed low tolerance under simulated shade. phyB and red/far‐red ratio had no effects on seedlings acclimated with nonstressful warm temperatures before the heat shock. The phyB mutant showed reduced expression of several fatty acid desaturase (FAD) genes and less proportion of fully unsaturated fatty acids and electrolyte leakage of membranes exposed to heat shocks. Red‐light‐activated phyB also reduced thermotolerance of dark‐grown seedlings but not via changes in FADs expression and membrane stability. We propose that the reduced photosynthetic capacity linked to thermotolerant membranes would be less costly under shade, where the light input limits photosynthesis.
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| Subjects: | HEAT SHOCK, LIGHT, MEMBRANE STABILITY, PHYB, |
| Online Access: | http://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber=47746 http://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber= http://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber= http://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber= http://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber= http://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber= |
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KOHA-OAI-AGRO:477462022-10-26T11:23:41Zhttp://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber=47746http://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber=http://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber=http://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber=http://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber=http://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber=AAGNeighbour signals perceived by phytochrome B increase thermotolerance in ArabidopsisArico, DeniseLegris, MartinaCastro, LucianaGarcía, Carlos FernandoLaino, AldanaCasal, Jorge JoséMazzella, María Agustinatextengapplication/pdfDue to the preeminence of reductionist approaches, understanding of plant responses to combined stresses is limited.Wespeculated that light‐quality signals of neighbouring vegetation might increase susceptibility to heat shocks because shade reduces tissue temperature and hence the likeness of heat shocks. In contrast, plants of Arabidopsis thaliana grown under low‐red/far‐red ratios typical of shade were less damaged by heat stress than plants grown under simulated sunlight. Neighbour signals reduce the activity of phytochrome B (phyB), increasing the abundance of PHYTOCHROMEINTERACTING FACTORS (PIFs). The phyB mutant showed high tolerance to heat stress even under simulated sunlight, and a pif multiple mutant showed low tolerance under simulated shade. phyB and red/far‐red ratio had no effects on seedlings acclimated with nonstressful warm temperatures before the heat shock. The phyB mutant showed reduced expression of several fatty acid desaturase (FAD) genes and less proportion of fully unsaturated fatty acids and electrolyte leakage of membranes exposed to heat shocks. Red‐light‐activated phyB also reduced thermotolerance of dark‐grown seedlings but not via changes in FADs expression and membrane stability. We propose that the reduced photosynthetic capacity linked to thermotolerant membranes would be less costly under shade, where the light input limits photosynthesis.Due to the preeminence of reductionist approaches, understanding of plant responses to combined stresses is limited.Wespeculated that light‐quality signals of neighbouring vegetation might increase susceptibility to heat shocks because shade reduces tissue temperature and hence the likeness of heat shocks. In contrast, plants of Arabidopsis thaliana grown under low‐red/far‐red ratios typical of shade were less damaged by heat stress than plants grown under simulated sunlight. Neighbour signals reduce the activity of phytochrome B (phyB), increasing the abundance of PHYTOCHROMEINTERACTING FACTORS (PIFs). The phyB mutant showed high tolerance to heat stress even under simulated sunlight, and a pif multiple mutant showed low tolerance under simulated shade. phyB and red/far‐red ratio had no effects on seedlings acclimated with nonstressful warm temperatures before the heat shock. The phyB mutant showed reduced expression of several fatty acid desaturase (FAD) genes and less proportion of fully unsaturated fatty acids and electrolyte leakage of membranes exposed to heat shocks. Red‐light‐activated phyB also reduced thermotolerance of dark‐grown seedlings but not via changes in FADs expression and membrane stability. We propose that the reduced photosynthetic capacity linked to thermotolerant membranes would be less costly under shade, where the light input limits photosynthesis.HEAT SHOCKLIGHTMEMBRANE STABILITYPHYBPlant, cell and environment |
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HEAT SHOCK LIGHT MEMBRANE STABILITY PHYB HEAT SHOCK LIGHT MEMBRANE STABILITY PHYB |
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HEAT SHOCK LIGHT MEMBRANE STABILITY PHYB HEAT SHOCK LIGHT MEMBRANE STABILITY PHYB Arico, Denise Legris, Martina Castro, Luciana García, Carlos Fernando Laino, Aldana Casal, Jorge José Mazzella, María Agustina Neighbour signals perceived by phytochrome B increase thermotolerance in Arabidopsis |
| description |
Due to the preeminence of reductionist approaches, understanding of plant responses to combined stresses is limited.Wespeculated that light‐quality signals of neighbouring vegetation might increase susceptibility to heat shocks because shade reduces tissue temperature and hence the likeness of heat shocks. In contrast, plants of Arabidopsis thaliana grown under low‐red/far‐red ratios typical of shade were less damaged by heat stress than plants grown under simulated sunlight. Neighbour signals reduce the activity of phytochrome B (phyB), increasing the abundance of PHYTOCHROMEINTERACTING FACTORS (PIFs). The phyB mutant showed high tolerance to heat stress even under simulated sunlight, and a pif multiple mutant showed low tolerance under simulated shade. phyB and red/far‐red ratio had no effects on seedlings acclimated with nonstressful warm temperatures before the heat shock. The phyB mutant showed reduced expression of several fatty acid desaturase (FAD) genes and less proportion of fully unsaturated fatty acids and electrolyte leakage of membranes exposed to heat shocks. Red‐light‐activated phyB also reduced thermotolerance of dark‐grown seedlings but not via changes in FADs expression and membrane stability. We propose that the reduced photosynthetic capacity linked to thermotolerant membranes would be less costly under shade, where the light input limits photosynthesis. |
| format |
Texto |
| topic_facet |
HEAT SHOCK LIGHT MEMBRANE STABILITY PHYB |
| author |
Arico, Denise Legris, Martina Castro, Luciana García, Carlos Fernando Laino, Aldana Casal, Jorge José Mazzella, María Agustina |
| author_facet |
Arico, Denise Legris, Martina Castro, Luciana García, Carlos Fernando Laino, Aldana Casal, Jorge José Mazzella, María Agustina |
| author_sort |
Arico, Denise |
| title |
Neighbour signals perceived by phytochrome B increase thermotolerance in Arabidopsis |
| title_short |
Neighbour signals perceived by phytochrome B increase thermotolerance in Arabidopsis |
| title_full |
Neighbour signals perceived by phytochrome B increase thermotolerance in Arabidopsis |
| title_fullStr |
Neighbour signals perceived by phytochrome B increase thermotolerance in Arabidopsis |
| title_full_unstemmed |
Neighbour signals perceived by phytochrome B increase thermotolerance in Arabidopsis |
| title_sort |
neighbour signals perceived by phytochrome b increase thermotolerance in arabidopsis |
| url |
http://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber=47746 http://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber= http://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber= http://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber= http://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber= http://ceiba.agro.uba.ar/cgi-bin/koha/opac-detail.pl?biblionumber= |
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| _version_ |
1756046818911715328 |