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Light-dependent photosynthetic characteristics indicated by chlorophyll fluorescence in micropropagated plants of Rhododendron ponticum subsp baeticum during acclimation

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dc.contributor.authorOsório, Maria Leonor
dc.contributor.authorOsório, Júlio
dc.contributor.authorRomano, Anabela
dc.date.accessioned2015-06-18T10:12:36Z
dc.date.available2015-06-18T10:12:36Z
dc.date.issued2007
dc.description.abstractMicropropagated plants of Rhododendron ponticum subsp. baeticum after acclimatization were grown in natural conditions at three levels of irradiance (HL = 1000, IL = 300 and LL = 80 mu mol m(-2) s(-1) using permanent shading. Light acclimation of photosynthesis was characterized using chlorophyll a fluorescence of intact leaves. There was a clear association between light acclimation of photosynthetic performance and growth irradiance. In general, the saturated electron transport rate, ETR, was higher for high (HL) and intermediate light (IL) than for low-light (LL) grown plants. The response of q(p), which represents PSII openness to incident light, indicates a ranking of tolerant capacity to photoinhibition of HL>IL>LL. The light acclimation of the non-radiative dissipation of excess energy in the antenna, q(N), was not very clear despite the highest value shown by HL plants. A clear feature of the light response of qp and qN is the gradual replacement of qp by qN with increasing light. However, this photoprotective strategy in LL plants seems to be less efficient than in HL plants. Moreover, after an exposition to strong light environment, the maximal photochemical efficiency of PSII (F-v/F-m) did not recover after 24 hours in IL and LL plants. This great plasticity of photosynthesis in R. ponticum plants indicates that the high light regimes during acclimation in the field can beneficiate the plant growth without photoinhibition effects.
dc.identifier.isbn978-90-6605-550-6
dc.identifier.issn0567-7572
dc.identifier.otherAUT: ARO01015; JOS01477;
dc.identifier.urihttp://hdl.handle.net/10400.1/6418
dc.language.isoeng
dc.publisherInternational Society for Horticultural Science
dc.relation.isbasedonP-004-EDR
dc.relation.ispartofActa Horticulturae
dc.titleLight-dependent photosynthetic characteristics indicated by chlorophyll fluorescence in micropropagated plants of Rhododendron ponticum subsp baeticum during acclimation
dc.typeconference object
dspace.entity.typePublication
oaire.citation.conferencePlaceMayan Riviera, Mexico
oaire.citation.endPage179
oaire.citation.startPage173
oaire.citation.titleProceedings of the Second International Symposium on Acclimatization and Establishment of Micropropagated Plants
oaire.citation.title2nd International Symposium on Acclimatization and Establishment of Micropropagated Plants
oaire.citation.volume748
person.familyNameOsório
person.familyNameOsório
person.familyNameRomano
person.givenNameMaria Leonor
person.givenNameJúlio
person.givenNameAnabela
person.identifier.ciencia-id8A18-7E9A-3B0E
person.identifier.orcid0000-0002-7713-6497
person.identifier.orcid0000-0002-4054-4091
person.identifier.orcid0000-0002-7204-7428
person.identifier.scopus-author-id7006394339
person.identifier.scopus-author-id9938818600
person.identifier.scopus-author-id56249997600
rcaap.rightsrestrictedAccess
rcaap.typeconferenceObject
relation.isAuthorOfPublication796eec66-f451-4ebf-938a-866b703df3ea
relation.isAuthorOfPublicationf4547ef6-b9f9-49e6-a7b3-ad71f623cfdf
relation.isAuthorOfPublicatione3343b60-17d3-4f5e-a2bf-06f26da69206
relation.isAuthorOfPublication.latestForDiscoverye3343b60-17d3-4f5e-a2bf-06f26da69206

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