Abstract
In this paper,plant growth and photosynthetic characteristics in leaves of flue-cured tobacco grown in continuous cropping soil for 2 and 5 years were investigated.The results showed that 2-years continuous cropping did not affect plant growth and photosynthetic characteristics in the leaves of flue-cured tobacco,but 5-years continuous cropping limited plant growth and photosynthetic capacity.The chlorophyll content in leaves of flue-cured tobacco grown in 5-years continuous cropping soil significantly reduced.The net photosynthetic rates(Pn),transpiration rate(Tr) and stomatal conductance(Gs) in leaves of flue-cured tobacco for 5-years continuous cropping decreased,but intercellular CO2 concentration(Ci) changed little.The apparent quantum yield(AQY),light saturation point(LSP),photosynthetic rate saturated light(Pmax),carbolyation efficiency(CE),CO2 saturation point(CSP) and photosynthetic rate at saturated CO2(Jmax) in leaves of tobacco decreased,and CO2 compensation point(CCP) and light compensation points(LCP) increased significantly for 5-years continuous cropping.It suggested that continuous cropping significantly decreased light and CO2 utilization in leaves of tobacco,and the decrease of photosynthetic capacity under 5-years continuous cropping was not only caused by stomatal factors,but also utilization ability of CO2 in mesophyll tissue.
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Claims 8
Claim · model-written summary
Two years of continuous cropping did not affect tobacco growth or leaf photosynthetic characteristics.
- Taxon
- flue-cured tobaccoe0
- Treatment
- 2-years continuous croppinge0
- Outcome
- plant growth and photosynthetic characteristicse0
- Direction
- did not affecte0
Not reportedComparator
Verbatim
e0“2-years continuous cropping did not affect plant growth and photosynthetic characteristics in the leaves of flue-cured tobacco”
Claim · model-written summary
Five years of continuous cropping limited tobacco growth.
- Taxon
- flue-cured tobaccot0
- Treatment
- 5-years continuous croppinge0
- Outcome
- plant growthe0
- Direction
- limitede0
Not reportedComparator
Verbatim
e0“5-years continuous cropping limited plant growth and photosynthetic capacity”
t0“flue-cured tobacco”
Claim · model-written summary
Five years of continuous cropping limited tobacco photosynthetic capacity.
- Taxon
- flue-cured tobaccot0
- Treatment
- 5-years continuous croppinge0
- Outcome
- photosynthetic capacitye0
- Direction
- limitede0
Not reportedComparator
Verbatim
e0“5-years continuous cropping limited plant growth and photosynthetic capacity”
t0“flue-cured tobacco”
Claim · model-written summary
Leaf chlorophyll content significantly declined after five years of continuous cropping.
- Taxon
- flue-cured tobaccoe0
- Treatment
- 5-years continuous cropping soile0
- Outcome
- chlorophyll contente0
- Direction
- reducede0
Not reportedComparator
Verbatim
e0“The chlorophyll content in leaves of flue-cured tobacco grown in 5-years continuous cropping soil significantly reduced”
Claim · model-written summary
Leaf net photosynthetic rate, transpiration and stomatal conductance decreased after five years.
- Taxon
- flue-cured tobaccoe0
- Treatment
- 5-years continuous croppinge0
- Outcome
- net photosynthetic rates(Pn),transpiration rate(Tr) and stomatal conductance(Gs)e0
- Direction
- decreasede0
Not reportedComparator
Verbatim
e0“The net photosynthetic rates(Pn),transpiration rate(Tr) and stomatal conductance(Gs) in leaves of flue-cured tobacco for 5-years continuous cropping decreased”
Claim · model-written summary
Leaf intercellular CO2 concentration changed little after five years of continuous cropping.
- Taxon
- flue-cured tobaccot0
- Treatment
- 5-years continuous croppinge1
- Outcome
- intercellular CO2 concentration(Ci)e0
- Direction
- changed littlee0
Not reportedComparator
Verbatim
e0“intercellular CO2 concentration(Ci) changed little”
t0“flue-cured tobacco”
e1“5-years continuous cropping decreased”
Claim · model-written summary
Six leaf light and CO2 response measures decreased after five years of continuous cropping.
- Taxon
- tobacco
Nicotiana tabacume0 - Treatment
- 5-years continuous croppinge1
- Outcome
- apparent quantum yield(AQY),light saturation point(LSP),photosynthetic rate saturated light(Pmax)e0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The apparent quantum yield(AQY),light saturation point(LSP),photosynthetic rate saturated light(Pmax),carbolyation efficiency(CE),CO2 saturation point(CSP) and photosynthetic rate at saturated CO2(Jmax) in leaves of tobacco decreased”
e1“5-years continuous cropping.It suggested”
Claim · model-written summary
CO2 compensation point and light compensation points increased significantly after five years.
- Taxon
- tobaccoNicotiana tabacumt0
- Treatment
- 5-years continuous croppinge0
- Outcome
- CO2 compensation point(CCP) and light compensation points(LCP)e0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“CO2 compensation point(CCP) and light compensation points(LCP) increased significantly for 5-years continuous cropping”
t0“tobacco”
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See all 6 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.