Abstract
Tobacco plants (Nicotiana tabacum cv. Sevilla) were grown under controlled conditions and submitted to regular fertilization with macro- and micronutrients. The aim of the experiment was to determine the response of NO3 - assimilation to four different boron (B) doses (B1: $0.5\ \mu {\rm M}\ {\rm H}_{3}{\rm BO}_{3}$; B2: 5 μM; B3: $10\ \mu {\rm M}\ {\rm H}_{3}{\rm BO}_{3}$; and B4: $20\ \mu {\rm M}\ {\rm H}_{3}{\rm BO}_{3}$). The content of foliar B and NO3 -, the activity of the enzymes related to the process of NO3 - reduction (NR, NiR, GS, GOGAT, and PEPC), and the end products of this process (amino acids and proteins) were analyzed. Our results indicate a positive effect of the B on its concentration in leaves and on NO3 - assimilation, possibly by an activation of the enzymatic proteins involved in this process. Boron addition significantly reduced the foliar NO3 - concentration. Finally, B affected plant growth, since an increase in leaf dry weight and in the content of proteins and amino acids was shown.
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Claims 4
Claim · model-written summary
Boron increased the boron concentration in tobacco leaves.
- Taxon
- Nicotiana tabacum
Nicotiana tabacume0 - Organ / stage
- leavese1
- Treatment
- four different boron (B) dosese4
- Outcome
- concentration in leavese1
- Direction
- positivee1
- Setting
- controlled conditionse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Tobacco plants (Nicotiana tabacum cv. Sevilla) were grown under controlled conditions”
e4“the response of NO3 - assimilation to four different boron (B) doses”
e1“Our results indicate a positive effect of the B on its concentration in leaves and on NO3 - assimilation”
Claim · model-written summary
Boron addition significantly reduced foliar nitrate concentration in tobacco.
- Taxon
- Nicotiana tabacumNicotiana tabacume0
- Treatment
- Boron additione2
- Outcome
- foliar NO3 - concentratione2
- Direction
- reducede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Tobacco plants (Nicotiana tabacum cv. Sevilla) were grown under controlled conditions”
e2“Boron addition significantly reduced the foliar NO3 - concentration”
Claim · model-written summary
Boron had a positive effect on nitrate assimilation in tobacco.
- Taxon
- Nicotiana tabacumNicotiana tabacume0
- Treatment
- four different boron (B) dosese4
- Outcome
- NO3 - assimilatione1
- Direction
- positivee1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Tobacco plants (Nicotiana tabacum cv. Sevilla) were grown under controlled conditions”
e4“the response of NO3 - assimilation to four different boron (B) doses”
e1“Our results indicate a positive effect of the B on its concentration in leaves and on NO3 - assimilation”
Claim · model-written summary
Boron increased leaf dry weight and the content of proteins and amino acids in tobacco.
- Taxon
- Nicotiana tabacumNicotiana tabacume0
- Treatment
- four different boron (B) dosese4
- Outcome
- leaf dry weight and in the content of proteins and amino acidse3
- Direction
- increasee3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Tobacco plants (Nicotiana tabacum cv. Sevilla) were grown under controlled conditions”
e4“the response of NO3 - assimilation to four different boron (B) doses”
e3“B affected plant growth, since an increase in leaf dry weight and in the content of proteins and amino acids was shown”
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