High photosynthesis rates in Brassiceae species are mediated by leaf anatomy enabling high biochemical capacity, rapid CO 2 diffusion and efficient light use.

Autor: Retta MA; Centre for Crop Systems Analysis, Wageningen University & Research, PO Box 430, 6700 AK, Wageningen, the Netherlands., Van Doorselaer L; Mechatronics, Biostatistics and Sensors (MeBioS), Biosystems Department, KU Leuven, Willem de Croylaan 42, B-3001, Leuven, Belgium., Driever SM; Centre for Crop Systems Analysis, Wageningen University & Research, PO Box 430, 6700 AK, Wageningen, the Netherlands., Yin X; Centre for Crop Systems Analysis, Wageningen University & Research, PO Box 430, 6700 AK, Wageningen, the Netherlands., de Ruijter NCA; Laboratory of Cell and Developmental Biology, Wageningen Light Microscopy Centre (WLMC), Wageningen University & Research, PO Box 633, 6700 AP, Wageningen, the Netherlands., Verboven P; Mechatronics, Biostatistics and Sensors (MeBioS), Biosystems Department, KU Leuven, Willem de Croylaan 42, B-3001, Leuven, Belgium., Nicolaï BM; Mechatronics, Biostatistics and Sensors (MeBioS), Biosystems Department, KU Leuven, Willem de Croylaan 42, B-3001, Leuven, Belgium., Struik PC; Centre for Crop Systems Analysis, Wageningen University & Research, PO Box 430, 6700 AK, Wageningen, the Netherlands.
Jazyk: angličtina
Zdroj: The New phytologist [New Phytol] 2024 Sep 18. Date of Electronic Publication: 2024 Sep 18.
DOI: 10.1111/nph.20136
Abstrakt: Certain species in the Brassicaceae family exhibit high photosynthesis rates, potentially providing a valuable route toward improving agricultural productivity. However, factors contributing to their high photosynthesis rates are still unknown. We compared Hirschfeldia incana, Brassica nigra, Brassica rapa and Arabidopsis thaliana, grown under two contrasting light intensities. Hirschfeldia incana matched B. nigra and B. rapa in achieving very high photosynthesis rates under high growth-light condition, outperforming A. thaliana. Photosynthesis was relatively more limited by maximum photosynthesis capacity in H. incana and B. rapa and by mesophyll conductance in A. thaliana and B. nigra. Leaf traits such as greater exposed mesophyll specific surface enabled by thicker leaf or high-density small palisade cells contributed to the variation in mesophyll conductance among the species. The species exhibited contrasting leaf construction strategies and acclimation responses to low light intensity. High-light plants distributed Chl deeper in leaf tissue, ensuring even distribution of photosynthesis capacity, unlike low-light plants. Leaf anatomy of H. incana, B. nigra and B. rapa facilitated effective CO 2 diffusion, efficient light use and provided ample volume for their high maximum photosynthetic capacity, indicating that a combination of adaptations is required to increase CO 2 -assimilation rates in plants.
(© 2024 The Author(s). New Phytologist © 2024 New Phytologist Foundation.)
Databáze: MEDLINE
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