Abstract
The aim of this study was to evaluate if endophytic bacteria inoculants would be beneficial to the sugarcane varieties IACSP94-2094 and IACSP95-5000, promoting changes in photosynthesis and plant growth. The plants, obtained from mini stalks with one bud, were treated with two bacteria mixtures (inoculum I or II) or did not receive any inoculum (control plants). The inocula did not affect shoot and root dry matter accumulation as compared to the control condition (plants with native endophytic bacteria). However, photosynthesis and electron transport rate (ETR) increased in IACSP94-2094 treated with the inoculum II, whereas the inoculum I enhanced photosynthesis and stomatal conductance in IACSP95-5000. The inoculum II caused increase in leaf sucrose concentration of IACSP94-2094 and decrease in IACSP95-5000 leaves. Leaf nitrogen concentration was not affected by treatments, but bacteria inoculation increased nitrate reductase activity in IACSP95-5000, and the highest activity was found in plants treated with the inoculum II. We can conclude that bacteria inoculation changed sugarcane physiology, improving photosynthesis and nitrate reduction in a genotype-dependent manner, without promoting plant growth under non-limiting conditions.
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Claims 8
Claim · model-written summary
Neither inoculum changed shoot and root dry matter accumulation.
Verbatim
e0“The inocula did not affect shoot and root dry matter accumulation as compared to the control condition (plants with native endophytic bacteria)”
t0“sugarcane”
Claim · model-written summary
Inoculum II increased photosynthesis and electron transport in IACSP94-2094.
- Taxon
- sugarcanet0
- Material
- IACSP94-2094e0
- Treatment
- inoculum IIe0
- Outcome
- photosynthesis and electron transport rate (ETR)e0
- Direction
- increasede0
Not reportedComparator
Verbatim
e0“photosynthesis and electron transport rate (ETR) increased in IACSP94-2094 treated with the inoculum II”
t0“sugarcane”
Claim · model-written summary
Inoculum I increased photosynthesis and stomatal conductance in IACSP95-5000.
- Taxon
- sugarcanet0
- Material
- IACSP95-5000e0
- Treatment
- inoculum Ie0
- Outcome
- photosynthesis and stomatal conductancee0
- Direction
- enhancede0
Not reportedComparator
Verbatim
e0“the inoculum I enhanced photosynthesis and stomatal conductance in IACSP95-5000”
t0“sugarcane”
Claim · model-written summary
Inoculum II increased leaf sucrose in IACSP94-2094.
- Taxon
- sugarcanet0
- Material
- IACSP94-2094e0
- Treatment
- inoculum IIe0
- Outcome
- leaf sucrose concentratione0
- Direction
- increasee0
Not reportedComparator
Verbatim
e0“The inoculum II caused increase in leaf sucrose concentration of IACSP94-2094”
t0“sugarcane”
Claim · model-written summary
Inoculum II decreased leaf sucrose in IACSP95-5000.
Not reportedTreatmentComparator
Verbatim
e0“decrease in IACSP95-5000 leaves”
t0“sugarcane”
Claim · model-written summary
Inoculation did not affect leaf nitrogen concentration.
Not reportedComparator
Verbatim
e0“Leaf nitrogen concentration was not affected by treatments”
t0“sugarcane”
Claim · model-written summary
Bacterial inoculation increased nitrate reductase activity in IACSP95-5000.
- Taxon
- sugarcanet0
- Material
- IACSP95-5000e0
- Treatment
- bacteria inoculatione0
- Outcome
- nitrate reductase activitye0
- Direction
- increasede0
Not reportedComparator
Verbatim
e0“bacteria inoculation increased nitrate reductase activity in IACSP95-5000”
t0“sugarcane”
Claim · model-written summary
Inoculum II produced the highest nitrate reductase activity.
Verbatim
e0“the highest activity was found in plants treated with the inoculum II”
t0“sugarcane”
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