Abstract
Manganese (Mn) is a fundamental micronutrient for several metabolic processes involved in plant growth and yield. Moreover, Foliar application of Mn contributes to increases in crop productivity, such as that of rice plants. Therefore, we hypothesized that these gains in rice productivity could be associated with increases in the photosynthetic capacities during grain filling, resulting from the foliar Mn supplementation in the rice plants. To this end, we cultivated rice plants in 10 L pots with floodplain soil, naturally low in Mn, under ambient conditions of an experimental field. These rice plants were treated with foliar application of Mn (1.5 kg ha−1 of Mn-carbonate as Mn source) during the tillering period and, subsequently, evaluated for morpho-physiological and yield characteristics. Rice plants were strongly influenced by foliar Mn supplementation, mainly for growth, concentration of Mn in different plant organs, and yield traits. The foliar Mn treatment promoted greater growth and production for the crop; however, photosynthetic characteristics (e.g. net CO2 assimilation rate and chlorophyll index) at the grain-filling stage were not affected by the Mn treatment. Our results suggest that the increase in rice productivity under foliar supplementation of Mn is not associated with photosynthetic activity, but is indicated by other possible mechanisms such as greater efficiency in the transport and storage of photoassimilates during the grain filling phase.
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Claims 7
Claim · model-written summary
Foliar manganese promoted rice growth.
- Taxon
- rice plants
Oryza sativae1 - Treatment
- foliar Mn treatmente0
- Outcome
- growthe0
- Direction
- greatere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The foliar Mn treatment promoted greater growth and production for the crop”
e1“These rice plants were treated with foliar application of Mn”
Claim · model-written summary
Foliar manganese promoted rice production.
- Taxon
- rice plantsOryza sativae1
- Treatment
- foliar Mn treatmente0
- Outcome
- productione0
- Direction
- greatere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The foliar Mn treatment promoted greater growth and production for the crop”
e1“These rice plants were treated with foliar application of Mn”
Claim · model-written summary
Foliar manganese influenced manganese concentrations in different rice organs.
- Taxon
- Rice plantsOryza sativae0
- Treatment
- foliar Mn supplementatione0
- Outcome
- concentration of Mn in different plant organse0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Rice plants were strongly influenced by foliar Mn supplementation, mainly for growth, concentration of Mn in different plant organs, and yield traits”
Claim · model-written summary
Foliar manganese did not affect grain-filling net CO2 assimilation rate.
- Taxon
- rice plantsOryza sativae1
- Organ / stage
- grain-filling stagee0
- Treatment
- Mn treatmente0
- Outcome
- net CO2 assimilation ratee0
- Direction
- not affectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“photosynthetic characteristics (e.g. net CO2 assimilation rate and chlorophyll index) at the grain-filling stage were not affected by the Mn treatment”
e1“These rice plants were treated with foliar application of Mn”
Claim · model-written summary
Foliar manganese did not affect grain-filling chlorophyll index.
- Taxon
- rice plantsOryza sativae1
- Organ / stage
- grain-filling stagee0
- Treatment
- Mn treatmente0
- Outcome
- chlorophyll indexe0
- Direction
- not affectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“photosynthetic characteristics (e.g. net CO2 assimilation rate and chlorophyll index) at the grain-filling stage were not affected by the Mn treatment”
e1“These rice plants were treated with foliar application of Mn”
Claim · model-written summary
Authors suggest the productivity increase was not associated with photosynthetic activity.
- Taxon
- riceOryza sativae0
- Treatment
- foliar supplementation of Mne0
- Outcome
- rice productivitye0
- Direction
- not associatede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the increase in rice productivity under foliar supplementation of Mn is not associated with photosynthetic activity”
Claim · model-written summary
Authors suggest greater photoassimilate transport and storage efficiency as a possible mechanism for rice productivity.
- Taxon
- riceOryza sativae1
- Outcome
- rice productivitye1
- Qualifier
- greater efficiency in the transport and storage of photoassimilates during the grain filling phasee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“other possible mechanisms such as greater efficiency in the transport and storage of photoassimilates during the grain filling phase”
e1“increase in rice productivity”
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