Photosynthetica 2022, 60(4):549-561 | DOI: 10.32615/ps.2022.051

Adaptive photosynthetic strategies of the invasive plant Sphagneticola trilobata and its hybrid to a low-light environment

W.Q. KE1, †, Y.R. PAN1, †, L.H. CHEN1, J.D. HUANG1, J.J. ZHANG1, X.Y. LONG1, M.L. CAI2, C.L. PENG1
1 Guangzhou Key Laboratory of Subtropical Biodiversity and Biomonitoring, Guangdong Provincial Key Laboratory of Biotechnology for Plant Development, College of Life Sciences, South China Normal University, 510631 Guangzhou, China
2 School of Life Science, Huizhou University, 516007 Huizhou, China

In stressful environments, invasive plants acclimate more efficiently than native plants and hybridization mainly contributes to this process. We examined changes in the morphological characteristics, photosynthetic characteristics, and antioxidant capacity of Sphagneticola trilobata and its hybrids in a low-light environment to explore their invasiveness, with Sphagneticola calendulacea serving as the control. The morphological plasticity of S. trilobata was not dominant, the maximal photochemical efficiency of PSII, actual quantum yield of PSII, and electron transport rate of PSⅡ increased and nonphotochemical quenching decreased, while S. calendulacea and the hybrid produced opposite results. S. trilobata showed fewer spots stained for reactive oxygen species in tissues, with an increase in superoxide dismutase activity. Although S. trilobata is a heliophilous plant, we found that the shade tolerance of S. trilobata and the hybrid were stronger than that of S. calendulacea, which may be one important mechanism of invasion.

Additional key words: growth strategy; hybridization; low light; photosynthesis; plant invasion.

Received: August 17, 2022; Revised: October 15, 2022; Accepted: December 8, 2022; Prepublished online: December 20, 2022; Published: December 21, 2022  Show citation

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KE, W.Q., PAN, Y.R., CHEN, L.H., HUANG, J.D., ZHANG, J.J., LONG, X.Y., CAI, M.L., & PENG, C.L. (2022). Adaptive photosynthetic strategies of the invasive plant Sphagneticola trilobata and its hybrid to a low-light environment. Photosynthetica, 60(4), 549-561. doi: 10.32615/ps.2022.051
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