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Early Identification of Plant Drought Stress Responses: Changes in Leaf Reflectance and Plant Growth Promoting Rhizobacteria Selection-The Case Study of Tomato Plants

2023-01-06Journal article Open access
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dc.contributor.authorRosa, Ana Paula
dc.contributor.authorBarão, Lúcia
dc.contributor.authorChambel, Lélia
dc.contributor.authorCruz, Cristina
dc.contributor.authorSantana, Margarida
dc.date.accessioned2024-01-16T18:57:44Z
dc.date.available2024-01-16T18:57:44Z
dc.date.issued2023-01-06
dc.description.abstractDrought is a worldwide problem, especially in arid and semi-arid regions. Detection of drought stress at the initial stages, before visible signs, to adequately manage irrigation and crop fertilization to avoid crop yield loss, is a desire of most farmers. Here, we evaluated the response of tomato plants to water scarcity, through changes in leaf reflectance due to modification in leaf pigments’ content, which translates into differences in spectral reflectance indices (SRI) values. Our methodology is innovative, as we were able to easily calculate and identify several SRIs for the early detection of drought stress “invisible” responses. We used a handheld spectro-radiometer to obtain SRI values from leaves of tomato plants growing under two different water regimes for 37 days. In an ensemble of 25 SRIs, we identified 12 that showed a consistent trend of significant differences between treatments along the experiment and within these, NDVI, SR, ZMI, Ctr2, GM1, and GM2 were already significantly different between treatments at day 7 after the start of the experiment and Ctr1 at day 9; although, no signs of damage were visible. Therefore, our results pinpoint these SRIs as promising proxies for the early detection of “invisible” responses to drought onset. We also analyzed the relationship between the monitored SRIs and plant morphological parameters measured during the experiment, highlighting a relationship between GM1 and plant height and leaf number. Finally, we observed a high abundance of putative beneficial bacteria among isolates collected from the tomato water-limited rhizo-environment at the terminus of the experiment, suggesting the active recruitment or selection of Plant Growth Promoting Rhizobacteria by tomato roots as a response to drought. Our work may be adapted into an easy protocol, of rapid execution, to be used in small-scale fields for early drought stress detection.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.urihttp://hdl.handle.net/10451/61811
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherMDPIpt_PT
dc.relationFCT R&D Unit funding UIDB/00329/2020pt_PT
dc.relationFCT SFRH/BD/136188/2018pt_PT
dc.subjectcrop management; drought stress; drought symptoms; spectral reflectance indices; PGPRpt_PT
dc.titleEarly Identification of Plant Drought Stress Responses: Changes in Leaf Reflectance and Plant Growth Promoting Rhizobacteria Selection-The Case Study of Tomato Plantspt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.volume13pt_PT
person.familyNameBarroso Silva Lourenço Rosa
person.familyNameBarão
person.familyNameMarcão Chambel
person.familyNameCruz
person.familyNameSantana
person.givenNameAna Paula
person.givenNameLúcia
person.givenNameLélia Mariana
person.givenNameCristina
person.givenNameMargarida
person.identifiersY7IRmQAAAAJ
person.identifier.ciencia-id5713-9E27-82AF
person.identifier.ciencia-idE019-AD68-283F
person.identifier.ciencia-id7D11-AAC8-1F50
person.identifier.ciencia-idE416-7201-8A84
person.identifier.ciencia-idE61F-B75C-90F8
person.identifier.orcid0000-0002-8718-1582
person.identifier.orcid0000-0002-1672-1473
person.identifier.orcid0000-0003-3100-463X
person.identifier.orcid0000-0002-5712-3939
person.identifier.ridB-8626-2015
person.identifier.scopus-author-id53264767300
person.identifier.scopus-author-id6503947335
person.identifier.scopus-author-id35936156600
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
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