Physiological characterization of photosynthesis, chloroplast ultrastructure, and nutrient content in bracts and rosette leaves from Glaucium flavum

Redondo‐Gómez, Susana; Mateos‐Naranjo, Enrique; Moreno, F. Javier

doi:10.1007/s11099-010-0065-9

Cited by 12 publications

(8 citation statements)

References 19 publications

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“…However, some studies also showed that photosynthesis may be controlled by the capacity of the chloroplast to fix CO2 rather than by increased diffusive resistance under severe water stress (Wullschleger and Oosterhuis 1991). There are also reports showing that the effects of drought and excessive water stress on photosynthesis are often not caused by stomatal factors, but by nonstomatal factors (Redondo-Gómez et al 2010). The reason for the differences between findings of our study and others may be due to differences in the duration and intensity of water stress and crops studied.…”

Section: Discussioncontrasting

confidence: 80%

Changes in photosynthetic and chlorophyll fluorescence characteristics of sorghum under drought and waterlogging stress

Zhang¹,

Zhu²,

Wang³

et al. 2019

Photosynt.

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Water stress is a key factor limiting sorghum growth and yield potential. This study investigated the changes in morphology, photosynthetic parameters, and fluorescence characteristics of sorghum under drought and waterlogging stress. The results indicated that these two types of water stress limited sorghum growth and led to a decrease in leaf chlorophyll (Chl), especially Chl a, which was accompanied by a decrease in net photosynthetic rate. In addition, under both types of water stress, the light-compensation point (LCP) and light-saturation point (LSP) both decreased, but the effect on these parameters was more obvious under drought. In terms of fluorescence parameters, the initial fluorescence and variable fluorescence increased under drought and waterlogging stress, while the maximum fluorescence did not change significantly, and the electron transport rate, photochemical quenching, and PSII actual quantum yield decreased. In summary, these results suggest that sorghum adapts to drought and waterlogging stress by reducing the leaf Chl a content, reducing LCP and LSP, and changing fluorescence parameters.

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Section: Discussioncontrasting

confidence: 80%

Changes in photosynthetic and chlorophyll fluorescence characteristics of sorghum under drought and waterlogging stress

Zhang¹,

Zhu²,

Wang³

et al. 2019

Photosynt.

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“…It is well known that leaves are the main photosynthetic organs in plant species, but numerous researchers have shown that non-leaf green organs are also an important source of assimilated carbon ( Tambussi et al , 2007 ; Redondo-Gómez et al , 2010 ; Pengelly et al , 2011 ; Hu et al , 2013 ; Jia et al , 2015 ; Zhang et al , 2015 ) and make a considerable contribution to terrestrial carbon exchange. In the case of cotton, bracts also have a photosynthetic function and contribute to carbon gain ( Zhang et al , 2010 ; Hu et al , 2012 , 2013 ).…”

Section: Discussionmentioning

confidence: 99%

“…In the case of cotton, bracts also have a photosynthetic function and contribute to carbon gain ( Zhang et al , 2010 ; Hu et al , 2012 , 2013 ). Moreover, it has been shown that some non-leaf green organs also have a strong stress tolerance, such as salt tolerance of rosette bracts ( Redondo-Gómez et al , 2010 ) and drought tolerance of cotton bracts ( Zhang et al , 2015 ) and wheat ears ( Jia et al , 2015 ). Hence, it is possible that, under abiotic stress conditions, non-leaf green organs make a considerable contribution to the carbon cycle.…”

Section: Discussionmentioning

confidence: 99%

“…It has been shown that non-leaf green organs are also an important source of assimilated carbon at the ecological and agricultural scales ( Tambussi et al , 2007 ; Redondo-Gómez et al , 2010 ; Pengelly et al , 2011 ; Hu et al , 2012 ; Jia et al , 2015 ; Zhang et al , 2015 ), and thus make a considerable contribution to the terrestrial carbon exchange. However, the importance of the mesophyll diffusion limitation for photosynthesis has yet to be studied in the non-leaf green organs.…”

Section: Introductionmentioning

confidence: 99%

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Mesophyll conductance in cotton bracts: anatomically determined internal CO2 diffusion constraints on photosynthesis

Han

Lei

Flexas

et al. 2018

Journal of Experimental Botany

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Mesophyll conductance (gm) has been shown to affect photosynthetic capacity and thus the estimates of terrestrial carbon balance. While there have been some attempts to model gm at the leaf and larger scales, the potential contribution of gm to the photosynthesis of non-leaf green organs has not been studied. Here, we investigated the influence of gm on photosynthesis of cotton bracts and how it in turn is influenced by anatomical structures, by comparing leaf palisade and spongy mesophyll with bract tissue. Our results showed that photosynthetic capacity in bracts is much lower than in leaves, and that gm is a limiting factor for bract photosynthesis to a similar extent to stomatal conductance. Bract and the spongy tissue of leaves have lower mesophyll conductance than leaf palisade tissue due to the greater volume fraction of intercellular air spaces, smaller chloroplasts, lower surface area of mesophyll cells and chloroplasts exposed to leaf intercellular air spaces and, perhaps, lower membrane permeability. Comparing bracts with leaf spongy tissue, although bracts have a larger cell wall thickness, they have a similar gm estimated from anatomical characteristics, likely due to the cumulative compensatory effects of subtle differences in each subcellular component, especially chloroplast traits. These results provide the first evidence for anatomical constraints on gm and photosynthesis in non-leaf green organs.

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“…As the organ of photosynthesis, chloroplast is the place where numerous biochemical reactions occur. Although there are a lot of studies in the influence of salt stress on plant cells and photosynthetic organelle ultrastructure (Aschan et al 2005, Redondo-Gómez et al 2010, the impact of inoculated AM fungi on subcellular ultrastructure has not been reported. It has been discovered that roots of beach plum could form symbiotic associations with AM fungi and G. mosseae inoculation could improve seedlings growth under salt stress (Zai et al 2007(Zai et al , 2009.…”

Section: Introductionmentioning

confidence: 99%

Effect of Glomus mosseae on chlorophyll content, chlorophyll fluorescence parameters, and chloroplast ultrastructure of beach plum (Prunus maritima) under NaCl stress

et al. 2012

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The present study was undertaken to investigate the effect of Glomus mosseae on chlorophyll (Chl) content, Chl fluorescence parameters and chloroplast ultrastructure of beach plum seedlings under 2% NaCl stress. The results showed that compared to control, both Chl a and Chl b contents of NaCl + G. mosseae treatment were significantly lower during the salt stress, while Chl a/b ratio increased significantly. The increase of minimal fluorescence of darkadapted state (F 0 ), and the decrease of maximal fluorescence of dark-adapted state (F m ) and variable fluorescence (F v ) values were inhibited. The maximum quantum yield of PSII photochemistry (F v /F m ), the maximum energy transformation potential of PSII photochemistry (F v /F 0 ) and the effective quantum yield of PSII photochemistry (Ф PSII ) increased significantly, especially the latter two variables. The values of the photochemical quenching coefficient (q P ) and the nonphotochemical quenching (NPQ) were similar between G. mosseae inoculation and noninoculation. It could be concluded that G. mosseae inoculation could protect the photosystem II (PSII) of beach plum, enhance the efficiency of primary light energy conversion and improve the primitive response of photosynthesis under salinity stress. Meanwhile, G. mosseae inoculation was beneficial to maintain the integrity of thylakoid membrane and to protect the structure and function of chloroplast, which suggested that G. mosseae can alleviate the damage of NaCl stress to chloroplast.

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Physiological characterization of photosynthesis, chloroplast ultrastructure, and nutrient content in bracts and rosette leaves from Glaucium flavum

Cited by 12 publications

References 19 publications

Changes in photosynthetic and chlorophyll fluorescence characteristics of sorghum under drought and waterlogging stress

Changes in photosynthetic and chlorophyll fluorescence characteristics of sorghum under drought and waterlogging stress

Mesophyll conductance in cotton bracts: anatomically determined internal CO2 diffusion constraints on photosynthesis

Effect of Glomus mosseae on chlorophyll content, chlorophyll fluorescence parameters, and chloroplast ultrastructure of beach plum (Prunus maritima) under NaCl stress

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