The photosynthetic, optical, and morphological characteristics of a chlorophyll-deficient (Chl-deficient) “yellow” soybean mutant (MinnGold) were examined in comparison with 2 green varieties (MN0095 and Eiko). Despite the large difference in Chl content, similar leaf photosynthesis rates were maintained in the Chl-deficient mutant by offsetting the reduced absorption of red photons by a small increase in photochemical efficiency and lower non-photochemical quenching. When grown in the field, at full canopy cover, the mutants reflected a significantly larger proportion of incoming shortwave radiation, but the total canopy light absorption was only slightly reduced, most likely due to a deeper penetration of light into the canopy space. As a consequence, canopy-scale gross primary production and ecosystem respiration were comparable between the Chl-deficient mutant and the green variety. However, total biomass production was lower in the mutant, which indicates that processes other than steady state photosynthesis caused a reduction in biomass accumulation over time. Analysis of non-photochemical quenching relaxation and gas exchange in Chl-deficient and green leaves after transitions from high to low light conditions suggested that dynamic photosynthesis might be responsible for the reduced biomass production in the Chl-deficient mutant under field conditions.
Sakowska, K., Alberti, G., Genesio, L., Peressotti, A., Delle Vedove, G., Gianelle, D., et al. (2018). Leaf and canopy photosynthesis of a chlorophyll deficient soybean mutant. PLANT, CELL AND ENVIRONMENT, 41(6), 1427-1437 [10.1111/pce.13180].
|Citazione:||Sakowska, K., Alberti, G., Genesio, L., Peressotti, A., Delle Vedove, G., Gianelle, D., et al. (2018). Leaf and canopy photosynthesis of a chlorophyll deficient soybean mutant. PLANT, CELL AND ENVIRONMENT, 41(6), 1427-1437 [10.1111/pce.13180].|
|Tipo:||Articolo in rivista - Articolo scientifico|
|Carattere della pubblicazione:||Scientifica|
|Presenza di un coautore afferente ad Istituzioni straniere:||Si|
|Titolo:||Leaf and canopy photosynthesis of a chlorophyll deficient soybean mutant|
|Autori:||Sakowska, K; Alberti, G; Genesio, L; Peressotti, A; Delle Vedove, G; Gianelle, D; Colombo, R; Rodeghiero, M; Panigada, C; Juszczak, R; Celesti, M; Rossini, M; Haworth, M; Campbell, B; Mevy, J; Vescovo, L; Cendrero-Mateo, M; Rascher, U; Miglietta, F|
|Data di pubblicazione:||2018|
|Rivista:||PLANT, CELL AND ENVIRONMENT|
|Digital Object Identifier (DOI):||http://dx.doi.org/10.1111/pce.13180|
|Appare nelle tipologie:||01 - Articolo su rivista|