Manganese accumulation in rice: implications for photosynthetic functioning

Lidon, Fernando C.; Barreiro, M.G.; Ramalho, José C.

doi:10.1016/j.jplph.2004.02.003

Cited by 133 publications

(96 citation statements)

References 53 publications

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“…In this context, under heat stress, F 0 and q NP did not vary significantly, in all the wheat genotypes (Table 4), indicating an higher efficiency of the excitation energy transfer from the associated PS II antennae (thus, implicating Chl structure and organization) in a close association to an efficient utilization of chemical energy in the Calvin Cycle (Yordanov et al, 1999). Additionally, as previously found in rice grown with high levels of Mn (Lidon et al, 2004), as F v /F m showed a strong stability in all genotypes (even if marginal significant changes occurred). Nevertheless, the lower levels of Mn during grain filling, in Golia (Table 2) seems to be linked to q P and q E (Table 4), justifying a decreasing efficiency in the conversion of the excitation energy used in the photochemical processes (Haldimann and Feller, 2005) and therefore a decreasing intra-thylakoidal gradient.…”

Section: Bootingsupporting

confidence: 83%

IV.Heat stress in Triticum: kinetics of Fe and Mn accumulation

Dias

Lidon

Ramalho

2009

Braz. J. Plant Physiol.

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The interactions between Fe/Mn accumulation and the photosynthetic light reactions were investigated in heat stressed bread and durum wheat genotypes (Triticum aestivum L. and Triticum turgidum subsp.durum). Four genotypes were chosen according to its genetic background diversity. Plants were grown in a greenhouse at two different day/night temperatures regimes (control -25/14ºC and heat stress -31/20ºC), during the grain filling phase. The contents and uptake/translocation of Fe and Mn were evaluated on booting, grain filling and maturity and correlated with chlorophyll a fluorescence parameters. It was found that, under heat stress, the concentrations of Fe in the culm and leaves diminished in bread wheat, but increased in durum wheat. An opposite trend was found on the contents of Fe in the spike, being this effect higher in Sever. During grain filling, the concentrations of Mn in the heat stressed plants raised significantly in the shoot for all genotypes (excepting Golia). After anthesis, the proportion of Mn translocated also augmented with high temperatures. At maturity, the same trend was found in the translocated proportion of Fe. During grain filling, all the studied fluorescence parameters did not vary significantly except q P and q E that decreased in the heat stressed Golia and F V and F v /F m that increases in Acalou. It was concluded that under heat stress, during the grain filling period, Fe and Mn translocation to the shoots accelerates, eventually to overcome the negative effects on several photosynthetic physiological traits.

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Section: Bootingsupporting

confidence: 83%

IV.Heat stress in Triticum: kinetics of Fe and Mn accumulation

Dias

Lidon

Ramalho

2009

Braz. J. Plant Physiol.

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“…Ferritin is located in plastids and represents important intracellular storage form for Fe [17][18][19]. Mn is essential for the oxygen evolution in photosystem II and for a series of enzymatic reactions (e.g., phosphoenolpyruvate carboxykinase, and superoxide dismutase) [1,2,13,[20][21][22]. Cu is present in the plastidial plastocyanin, in the mitochondrial cytochrome c oxidase, in Cu-Zn superoxide dismutase as well as in a series of other proteins [1,2,13,[23][24][25][26].…”

Section: Heavy Metals: Micronutrients or Pollutants?mentioning

confidence: 99%

Heavy Metals in Crop Plants: Transport and Redistribution Processes on the Whole Plant Level

2015

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Abstract:Copper, zinc, manganese, iron, nickel and molybdenum are essential micronutrients for plants. However, when present in excess they may damage the plant or decrease the quality of harvested plant products. Some other heavy metals such as cadmium, lead or mercury are not needed by plants and represent pollutants. The uptake into the roots, the loading into the xylem, the acropetal transport to the shoot with the transpiration stream and the further redistribution in the phloem are crucial for the distribution in aerial plant parts. This review is focused on long-distance transport of heavy metals via xylem and phloem and on interactions between the two transport systems. Phloem transport is the basis for the redistribution within the shoot and for the accumulation in fruits and seeds. Solutes may be transferred from the xylem to the phloem (e.g., in the small bundles in stems of cereals, in minor leaf veins). Nickel is highly phloem-mobile and directed to expanding plant parts. Zinc and to a lesser degree also cadmium are also mobile in the phloem and accumulate in meristems (root tips, shoot apex, axillary buds). Iron and manganese are characterized by poor phloem mobility and are retained in older leaves.

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“…Manganese (Mn) is an essential trace element for plants and plays a crucial role in several metabolic processes including photosynthesis, respiration, synthesis of ATP, fatty acid, amino acids, lipids, proteins, flavonoids, and hormone activation (Lidon et al 2004;Millaleo et al 2010). Manganese deficiency is detrimental to plants because it affects the water-splitting step of photosystem II (PS II), which directly provides electrons for photosynthesis.…”

Section: Introductionmentioning

confidence: 99%

Manganese-induced salt stress tolerance in rice seedlings: regulation of ion homeostasis, antioxidant defense and glyoxalase systems

Rahman

Hossain

Mahmud

et al. 2016

Physiol Mol Biol Plants

131

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Hydroponically grown 12-day-old rice (Oryza sativa L. cv. BRRI dhan47) seedlings were exposed to 150 mM NaCl alone and combined with 0.5 mM MnSO 4 . Salt stress resulted in disruption of ion homeostasis by Na ? influx and K ? efflux. Higher accumulation of Na ? and water imbalance under salinity caused osmotic stress, chlorosis, and growth inhibition. Salt-induced ionic toxicity and osmotic stress consequently resulted in oxidative stress by disrupting the antioxidant defense and glyoxalase systems through overproduction of reactive oxygen species (ROS) and methylglyoxal (MG), respectively. The saltinduced damage increased with the increasing duration of stress. However, exogenous application of manganese (Mn) helped the plants to partially recover from the inhibited growth and chlorosis by improving ionic and osmotic homeostasis through decreasing Na ? influx and increasing water status, respectively. Exogenous application of Mn increased ROS detoxification by increasing the content of the phenolic compounds, flavonoids, and ascorbate (AsA), and increasing the activities of monodehydroascorbate reductase (MDHAR), dehydroascorbate reductase (DHAR), superoxide dismutase (SOD), and catalase (CAT) in the salt-treated seedlings. Supplemental Mn also reinforced MG detoxification by increasing the activities of glyoxalase I (Gly I) and glyoxalase II (Gly II) in the salt-affected seedlings. Thus, exogenous application of Mn conferred salt-stress tolerance through the coordinated action of ion homeostasis and the antioxidant defense and glyoxalase systems in the salt-affected seedlings.

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Manganese accumulation in rice: implications for photosynthetic functioning

Cited by 133 publications

References 53 publications

IV.Heat stress in Triticum: kinetics of Fe and Mn accumulation

IV.Heat stress in Triticum: kinetics of Fe and Mn accumulation

Heavy Metals in Crop Plants: Transport and Redistribution Processes on the Whole Plant Level

Manganese-induced salt stress tolerance in rice seedlings: regulation of ion homeostasis, antioxidant defense and glyoxalase systems

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