Abstract
Harsh environments and climate change hamper industrial hemp productivity. Under stress conditions, uniform germination and vigorous seedlings are key to sustaining crop establishment and performance. Trichoderma spp. are beneficial micromycetes, able to colonize plant roots and promote plant development even under abiotic stress conditions. Thus, the seed treatment with specifically selected Trichoderma isolates could be a useful strategy to enhance hemp seed germination and plantlet growth. In this view, a preliminary screening was performed with ‘Eletta campana’ cv. Nine out of 20 Trichoderma isolates enhanced the radicle growth (+66–111%); most of them resulted in good root colonization, but only four isolates significantly enhanced the shoot DW (+18–22%). Three isolates were selected for a pot experiment, compared to T. afroharzianum T22, to evaluate the effect on plant growth, root architecture, accumulation of photosynthetic pigments and stress-related compounds, and variation in antioxidant activity in 20-day-old plantlets. T. afroharzianum OR4 significantly promoted plantlet growth (+9% shoot DW and +11% leaf DW). The seed treatment had a low impact on the other variables studied, except in the case of foliar proline content, a marker of stress tolerance, that was greatly increased with T. afroharzianum T22 and T. atrobrunneum X44 (+32% and +17% DW).
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Claims 8
Claim · model-written summary
Nine of 20 Trichoderma isolates enhanced radicle growth by 66–111%.
- Taxon
- hemp
Cannabis sativa subsp. sativat0 - Material
- ‘Eletta campana’t1
- Treatment
- Trichoderma isolatese0
- Interactor
- Trichoderma isolatese0symbiont
- Outcome
- radicle growthe0
- Direction
- enhancede0
- Value
- +66–111%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nine out of 20 Trichoderma isolates enhanced the radicle growth (+66–111%)”
t0“Industrial Hemp”
t1“‘Eletta campana’ cv.”
Claim · model-written summary
Most tested Trichoderma isolates colonized roots well.
- Taxon
- HempCannabis sativa subsp. sativat0
- Interactor
- Trichoderma isolatest1symbiont
- Outcome
- good root colonizatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“most of them resulted in good root colonization”
t0“Hemp”
t1“20 Trichoderma isolates enhanced”
Claim · model-written summary
Four isolates increased shoot dry weight by 18–22%.
- Taxon
- HempCannabis sativa subsp. sativat0
- Treatment
- four isolatese0
- Outcome
- shoot DWe0
- Direction
- enhancede0
- Value
- +18–22%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“only four isolates significantly enhanced the shoot DW (+18–22%)”
t0“Hemp”
Claim · model-written summary
T. afroharzianum OR4 increased shoot dry weight by 9%.
- Taxon
- HempCannabis sativa subsp. sativat0
- Treatment
- T. afroharzianum OR4e0
- Interactor
- T. afroharzianum OR4Trichoderma afroharzianume0symbiont
- Outcome
- shoot DWe0
- Direction
- promotede0
- Value
- +9%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“T. afroharzianum OR4 significantly promoted plantlet growth (+9% shoot DW and +11% leaf DW).”
t0“Hemp”
Claim · model-written summary
T. afroharzianum OR4 increased leaf dry weight by 11%.
- Taxon
- HempCannabis sativa subsp. sativat0
- Treatment
- T. afroharzianum OR4e0
- Interactor
- T. afroharzianum OR4Trichoderma afroharzianume0symbiont
- Outcome
- leaf DWe0
- Direction
- promotede0
- Value
- +11%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“T. afroharzianum OR4 significantly promoted plantlet growth (+9% shoot DW and +11% leaf DW).”
t0“Hemp”
Claim · model-written summary
T. afroharzianum T22 increased foliar proline content by 32% DW.
- Taxon
- HempCannabis sativa subsp. sativat0
- Treatment
- T. afroharzianum T22e0
- Interactor
- T. afroharzianum T22Trichoderma afroharzianume0symbiont
- Outcome
- foliar proline contente0
- Direction
- increasede0
- Value
- +32%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“foliar proline content, a marker of stress tolerance, that was greatly increased with T. afroharzianum T22 and T. atrobrunneum X44 (+32% and +17% DW)”
t0“Hemp”
Claim · model-written summary
T. atrobrunneum X44 increased foliar proline content by 17% DW.
- Taxon
- HempCannabis sativa subsp. sativat0
- Treatment
- T. atrobrunneum X44e0
- Interactor
- T. atrobrunneum X44Trichoderma atrobrunneume0symbiont
- Outcome
- foliar proline contente0
- Direction
- increasede0
- Value
- +17% DWe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“foliar proline content, a marker of stress tolerance, that was greatly increased with T. afroharzianum T22 and T. atrobrunneum X44 (+32% and +17% DW)”
t0“Hemp”
Claim · model-written summary
Seed treatment had low impact on other measured traits.
- Taxon
- HempCannabis sativa subsp. sativat0
- Treatment
- seed treatmente0
- Outcome
- other variables studiede0
- Direction
- low impacte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The seed treatment had a low impact on the other variables studied”
t0“Hemp”
The same questions in other papers
Trichoderma · growth · Cannabis sativaPositive and negative results
2 papers in the same direction as this paper · 1 in the opposite direction
- negative
- positive
- positive
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.