Leaf photosynthetic characteristics and photosystem II photochemistry  of rice (Oryza sativa L.) under potassium-solubilizing bacteria inoculation

Khanghahi, Mohammad Yaghoubi; Pirdashti, Hemmatollah; Rahimian, H.; Nematzadeh, Ghorbanali; Sepanlou, Mehdi Ghajar; Salvatori, Elisabetta; Crecchio, Carmine

doi:10.32615/ps.2019.065

Cited by 22 publications

(26 citation statements)

References 55 publications

(55 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It has been proved that the P rate increases by improving the status of leaf nutrients, including nitrogen, phosphorus, potassium, and zinc, while D rate decreases [28], which consequently lead to higher grain yield, as confirmed in our research by the significant positive relationship between P rate with grain yield. According to previous studies, these nutrients, released by microbial activity and chemical fertilizers, can improve the PSII photochemistry functions, electron transport systems, photosynthetic pigments biosynthesis and grain yield under both non-stress and stress conditions [29][30][31].…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Changes in Photo-Protective Energy Dissipation of Photosystem II in Response to Beneficial Bacteria Consortium in Durum Wheat under Drought and Salinity Stresses

2020

View full text Add to dashboard Cite

The present research aimed at evaluating the harmless dissipation of excess excitation energy by durum wheat (Triticum durum Desf.) leaves in response to the application of a bacterial consortium consisting of four plant growth-promoting bacteria (PGPB). Three pot experiments were carried out under non-stress, drought (at 40% field capacity), and salinity (150 mM NaCl) conditions. The results showed that drought and salinity affected photo-protective energy dissipation of photosystem II (PSII) increasing the rate of non-photochemical chlorophyll fluorescence quenching (NPQ (non-photochemical quenching) and qCN (complete non-photochemical quenching)), as well as decreasing the total quenching of chlorophyll fluorescence (qTQ), total quenching of variable chlorophyll fluorescence (qTV) and the ratio of the quantum yield of actual PSII photochemistry, in light-adapted state to the quantum yield of the constitutive non-regulatory NPQ (PQ rate). Our results also indicated that the PGPB inoculants can mitigate the adverse impacts of stresses on leaves, especially the saline one, in comparison with the non-fertilized (control) treatment, by increasing the fraction of light absorbed by the PSII antenna, PQ ratio, qTQ, and qTV. In the light of findings, our beneficial bacterial strains showed the potential in reducing reliance on traditional chemical fertilizers, in particular in saline soil, by improving the grain yield and regulating the amount of excitation energy.

show abstract

Section: Discussionmentioning

confidence: 99%

“…On the other hand, the ratio of Chla to Chlb (Chla/b) showed no significant changes under microbiological/chemical fertilization treatments. This may be caused by the different sensitivity of Chla and b under external environment [31,34].…”

Section: Discussionmentioning

confidence: 99%

Changes in Photo-Protective Energy Dissipation of Photosystem II in Response to Beneficial Bacteria Consortium in Durum Wheat under Drought and Salinity Stresses

2020

View full text Add to dashboard Cite

show abstract

“…Actually, the increment of leaf chlorophyll concentration, as the light-harvesting antenna associated with PSI and PSII reaction center in the thylakoid membrane, can protect the photosynthetic machinery upon subsequent application of PGPB inoculation, likely owing to enhanced production of IAA (Kanagendran et al 2019), 1-aminocyclopropane-1-carboxylate (ACC) deaminase activity (Kumar et al 2019) and bio-availability of soil nutrients (Yaghoubi Khanghahi et al 2018b;Hagaggi and Mohamed 2020). A significant relationship between plant photosynthetic pigments and leaf nutrient concentration, such as N, P and K, has been widely found in crops (Liu et al 2019;Yaghoubi Khanghahi et al 2019a).…”

Section: Discussionmentioning

confidence: 99%

“…In fact, carotenoids, composed of carotenes and xanthophylls, have the fundamental role in harvesting light energy for photosynthesis, dissipating of excess light energy and providing protection to reaction centers under stress (Acosta-Motos et al 2017). Moreover, the increase in Chlb could be most probably due to an increase in the amount of the major antenna complex of PSII where Chlb is bound (Yaghoubi Khanghahi et al 2019a).…”

Section: Discussionmentioning

confidence: 99%

Photosynthetic responses of durum wheat to chemical/microbiological fertilization management under salt and drought stresses

2021

View full text Add to dashboard Cite

The current research was carried out to evaluate the stress tolerance potential of durum wheat plants, in response to the inoculation of native plant growth-promoting bacteria (PGPB), through assessing PSII photochemistry and photosynthetic traits, as well as grain yield and plant height, and to investigate the possibility of using PGPB as a sustainable alternative or in combination with traditional fertilization plans. A greenhouse experiment included chemical/microbiological fertilization and stress (salinity and drought) treatments. The results indicated that the application of bacterial consortium of four PGPB markedly augmented some biochemical and functional traits in photosystem II, such as effective quantum yield of PSII photochemistry (Y(II)), electron transport rate of PSII (ETR), photosynthesis capacity, transpiration rate and stomatal conductance in unstressed plants, and prevented severe changes in the mentioned traits under drought and salinity conditions. The application of PGPB contributed to enhanced grain yield, too. Furthermore, a better performance of the PGPB inoculation was found in combination with half-dose of the recommended chemical fertilizers. In conclusion, PGPB inoculants maintain or improve the photosynthesis efficiency of durum wheat, grain yield and plant height, particularly under stress conditions, and can help to minimize the consumption of chemical fertilizers.

show abstract

“…This is consistent with the frequently observed K + limitation for soil microbes that can easily absorb K + from the decomposing soil organic matter [ 209 ]. In this context, there are several bacterial clades with high capacity to resorb K + from soil aggregates and clays and solubilize it, thus increasing K + availability [ 210 , 211 ]. Further, plants can improve their capacity for K + uptake by mycorrhization [ 212 , 213 , 214 ] and root exudates [ 215 , 216 ].…”

Section: Role Of K In Terrestrial Ecosystemsmentioning

confidence: 99%

Potassium Control of Plant Functions: Ecological and Agricultural Implications

Sardans

Peñuelas

2021

Plants

152

View full text Add to dashboard Cite

Potassium, mostly as a cation (K+), together with calcium (Ca2+) are the most abundant inorganic chemicals in plant cellular media, but they are rarely discussed. K+ is not a component of molecular or macromolecular plant structures, thus it is more difficult to link it to concrete metabolic pathways than nitrogen or phosphorus. Over the last two decades, many studies have reported on the role of K+ in several physiological functions, including controlling cellular growth and wood formation, xylem–phloem water content and movement, nutrient and metabolite transport, and stress responses. In this paper, we present an overview of contemporary findings associating K+ with various plant functions, emphasizing plant-mediated responses to environmental abiotic and biotic shifts and stresses by controlling transmembrane potentials and water, nutrient, and metabolite transport. These essential roles of K+ account for its high concentrations in the most active plant organs, such as leaves, and are consistent with the increasing number of ecological and agricultural studies that report K+ as a key element in the function and structure of terrestrial ecosystems, crop production, and global food security. We synthesized these roles from an integrated perspective, considering the metabolic and physiological functions of individual plants and their complex roles in terrestrial ecosystem functions and food security within the current context of ongoing global change. Thus, we provide a bridge between studies of K+ at the plant and ecological levels to ultimately claim that K+ should be considered at least at a level similar to N and P in terrestrial ecological studies.

show abstract

Leaf photosynthetic characteristics and photosystem II photochemistry of rice (Oryza sativa L.) under potassium-solubilizing bacteria inoculation

Cited by 22 publications

References 55 publications

Changes in Photo-Protective Energy Dissipation of Photosystem II in Response to Beneficial Bacteria Consortium in Durum Wheat under Drought and Salinity Stresses

Changes in Photo-Protective Energy Dissipation of Photosystem II in Response to Beneficial Bacteria Consortium in Durum Wheat under Drought and Salinity Stresses

Photosynthetic responses of durum wheat to chemical/microbiological fertilization management under salt and drought stresses

Potassium Control of Plant Functions: Ecological and Agricultural Implications

Contact Info

Product

Resources

About