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Article

Stem Photosynthesis Affects Hydraulic Resilience in the Deciduous Populusalba but Not in the Evergreen Laurus nobilis

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Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche ed Ambientali, Università di Messina, Salita Stagno D, Alcontres, 31, 98166 Messina, Italy
2
Dipartimento di Scienze della Vita, Università di Trieste, Via L. Giorgieri, 10, 34127 Trieste, Italy
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Dipartimento di Scienze AgroAlimentari, Ambientali e Animali, Università di Udine, Via delle Scienze, 91, 33100 Udine, Italy
*
Author to whom correspondence should be addressed.
Academic Editor: Teresa Afonso do Paço
Water 2021, 13(20), 2911; https://doi.org/10.3390/w13202911
Received: 27 September 2021 / Revised: 8 October 2021 / Accepted: 14 October 2021 / Published: 16 October 2021
Stem photosynthesis has been suggested to play relevant roles to cope with different biotic and abiotic stress factors, including drought. In the present study, we performed measurements of stem hydraulic conductance and non-structural carbohydrate content in the evergreen Laurus nobilis L. and the deciduous Populusalba L., subjected to inhibition of stem photosynthesis and successive exposure to a drought-recovery cycle in order to check if stem photosynthesis may be involved in allowing hydraulic recovery after drought stress relief. Stem shading affected the growth of L. nobilis but not of P. alba saplings. By contrast, inhibition of stem photosynthesis was coupled to inhibition of hydraulic recovery following embolism build-up under drought in P. alba but not in L. nobilis. The two study species showed a different content and behavior of nonstructural carbohydrates (NSCs). The differences in NSCs’ trend and embolism reversal ability led to a significant relationship between starch content and the corresponding hydraulic conductance values in L. nobilis but not in P. alba. Our findings suggest that stem photosynthesis plays a key role in the maintenance of hydraulic functioning during drought especially in the deciduous species. This, in turn, may increase their vulnerability under current global climate change scenarios. View Full-Text
Keywords: deciduous; drought; evergreen; hydraulic recovery; laurel; poplar; nonstructural carbohydrates; starch; sugars; xylem embolism deciduous; drought; evergreen; hydraulic recovery; laurel; poplar; nonstructural carbohydrates; starch; sugars; xylem embolism
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MDPI and ACS Style

Trifilò, P.; Natale, S.; Gargiulo, S.; Abate, E.; Casolo, V.; Nardini, A. Stem Photosynthesis Affects Hydraulic Resilience in the Deciduous Populusalba but Not in the Evergreen Laurus nobilis. Water 2021, 13, 2911. https://doi.org/10.3390/w13202911

AMA Style

Trifilò P, Natale S, Gargiulo S, Abate E, Casolo V, Nardini A. Stem Photosynthesis Affects Hydraulic Resilience in the Deciduous Populusalba but Not in the Evergreen Laurus nobilis. Water. 2021; 13(20):2911. https://doi.org/10.3390/w13202911

Chicago/Turabian Style

Trifilò, Patrizia, Sara Natale, Sara Gargiulo, Elisa Abate, Valentino Casolo, and Andrea Nardini. 2021. "Stem Photosynthesis Affects Hydraulic Resilience in the Deciduous Populusalba but Not in the Evergreen Laurus nobilis" Water 13, no. 20: 2911. https://doi.org/10.3390/w13202911

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