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Different rootstocks can change the photosynthetic performance of the ‘Uba’ mango scion after recurrent drought events

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Abstract

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PITOTAL, PIABS, DI0/RC, and δR0 are good markers of water stress in mango trees, demonstrating that consecutive drought cycles can develop differential acclimatization, depending on the rootstock used.

Abstract

Drought stress is one of the premier limitations to global agricultural production due to the complexity of the water-limiting environment and changing climate. In addition to indicating plant drought stress, photosynthetic performance is also determined by the scion/rootstock combination. The chlorophyll a fluorescence analysis is a reliable method to identify the most promising rootstock in the production of ‘Uba’ mango seedlings. We tested the hypothesis that different rootstocks can change the physiological responses related to chlorophyll a fluorescence, gas exchange, and proline content of different combinations of mango scion/rootstocks after three consecutive drought cycles, identifying the most vigorous rootstock with the ability to generate ‘Uba’ mango trees with greater differential resistance to drought. The Oleo rootstock (UC2/Oleo combination) has the greatest ability to imprint differential drought resistance in ‘Uba’ mango scions, generating plants with more vigor and better resistance to water deficit. The results suggest that the plant’s consecutive cycles of drought have been “learned” as a resistance mechanism to cope with severe water shortages in the future.

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The generated and analyzed database for the current study is available from the corresponding author on reasonable request.

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Acknowledgements

We thank the National Council for Scientific and Technological Development (CNPq, Brazil) for supporting this research and the nursery Frucafé Mudas e Plantas Ltda. and Mr. Erli Ropke for material support.

Funding

This study was financed in part by the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior—Brasil (CAPES)—Finance Code 001.

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Correspondence to Leonardo Faria-Silva.

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The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.

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Fig. S1

Relationships between net photosynthesis (µmol CO2 m−2 s−1) with drought days (A, B, C) and substrate moisture content with drought days (D, E, F) in pots with UC2/Oleo (A, D), UC2/Uba (B, E) and UC2/Imbu (C, F) combinations. The substrate moisture content was represented by a HydroFarm portable meter (%) and by the calculated volumetric substrate moisture content (VSMC), i.e., H2O content (cm−3) per substrate total volume (cm−3). Error bars represent ± SE of the mean (n = 3) (TIF 20182 KB)

Fig. S2

Relationship between substrate moisture calculated by volumetric substrate moisture content (VSMC, cm−3 cm−3) and measured by HydroFarm apparatus (%) (TIF 9641 KB)

Supplementary file3 (DOCX 19 KB)

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Faria-Silva, L., Silva, D.M. Different rootstocks can change the photosynthetic performance of the ‘Uba’ mango scion after recurrent drought events. Trees 37, 1385–1399 (2023). https://doi.org/10.1007/s00468-023-02429-x

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  • DOI: https://doi.org/10.1007/s00468-023-02429-x

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  1. Leonardo Faria-Silva