Abstract
• This study shows the impact of seaweed biostimulants at alleviating heat stress in chilli pepper • Simulated heatwaves were used to elucidate the mode of action of seaweed-based biostimulants • Integrated trait and gene analyses revealed HSFA2 and HSP101 as biomarkers of efficacy • Application of A. nodosum extract Martello® improved pollen quality, ovule development and yield • Biostimulants reduced heat stress impact during reproduction, increasing crop yield Climate change negatively impacts farming with rising temperatures and heatwaves, damaging crops. Biostimulants are a promising tool to deal with these effects. This study evaluated two seaweed extracts from Ascophyllum nodosum (Martello®) and Ecklonia maxima (EME) for their efficacy to alleviate the impact of high temperatures during the reproductive phase of chilli pepper plants. Both extracts claim to improve tolerance to stress during the reproductive phase, however Martello® demonstrated an enhanced performance when compared to the Ecklonia maxima extract (EME) after exposure to high temperatures (36/18°C) for fifteen days. It improved pollen viability by a 94% while the number of developed ovules in pistils increased by a 48% when compared to untreated plants exposed to high temperatures. Similarly, Martello® efficiently reduced oxidative stress in leaves when compared to the untreated plants or EME, maintaining a high expression of HSFA2 and HSP101 in leaves and flowers after 15 days of stress, likely protecting photosynthesis and increasing fructose in leaves by 48%. Moreover, Martello® increased the number of xylem vessel elements and ray parenchyma in the main stem of chilli peppers by 35 and 60% respectively, improving water transport and the storage of starch. All these parameters combined led to a 50% yield increase in plants treated with Martello® and exposed to high temperatures, while no improvement was observed after the EME treatment. The results presented in this study indicates that Martello® alleviates the impact of high temperatures during the reproductive phase of plants, improving plant fitness, thermoadaptation and, ultimately, yield.
Abstract from the paper’s OpenAlex record; open copy licensed cc-by-nc-nd. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 12
Claim · model-written summary
Martello® improved pollen viability by 94% in chilli pepper exposed to high temperatures compared with untreated plants.
Verbatim
t0“heat stress tolerance of chilli pepper”
e1“It improved pollen viability by a 94% while the number of developed ovules in pistils increased by a 48% when compared to untreated plants exposed to high temperatures”
e2“Martello® demonstrated an enhanced performance when compared to the Ecklonia maxima extract (EME) after exposure to high temperatures (36/18°C) for fifteen days”
Claim · model-written summary
Martello® increased the number of developed ovules in pistils by 48% in chilli pepper exposed to high temperatures compared with untreated plants.
Verbatim
t0“heat stress tolerance of chilli pepper”
e1“It improved pollen viability by a 94% while the number of developed ovules in pistils increased by a 48% when compared to untreated plants exposed to high temperatures”
e2“Martello® demonstrated an enhanced performance when compared to the Ecklonia maxima extract (EME) after exposure to high temperatures (36/18°C) for fifteen days”
Claim · model-written summary
Martello® reduced oxidative stress in chilli pepper leaves compared with untreated plants or EME.
Verbatim
t0“heat stress tolerance of chilli pepper”
e3“Similarly, Martello® efficiently reduced oxidative stress in leaves when compared to the untreated plants or EME”
Claim · model-written summary
Martello® maintained high expression of HSFA2 and HSP101 in chilli pepper leaves and flowers after 15 days of heat stress.
- Taxon
- chilli peppert0
- Organ / stage
- leaves and flowerse4
- Treatment
- Martello®e4
- Gene
- HSFA2 and HSP101e4
- Outcome
- expressione4
- Direction
- maintaininge4
- Qualifier
- after 15 days of stresse4
Not reportedComparator
Verbatim
t0“heat stress tolerance of chilli pepper”
e4“Martello® efficiently reduced oxidative stress in leaves when compared to the untreated plants or EME, maintaining a high expression of HSFA2 and HSP101 in leaves and flowers after 15 days of stress”
Claim · model-written summary
Martello® increased fructose in chilli pepper leaves by 48%.
- Taxon
- chilli peppert0
- Organ / stage
- leavese5
- Treatment
- Martello®e4
- Outcome
- fructose in leavese5
- Direction
- increasinge5
- Value
- 48%e5
Not reportedComparator
Verbatim
t0“heat stress tolerance of chilli pepper”
e4“Martello® efficiently reduced oxidative stress in leaves when compared to the untreated plants or EME, maintaining a high expression of HSFA2 and HSP101 in leaves and flowers after 15 days of stress”
e5“likely protecting photosynthesis and increasing fructose in leaves by 48%”
Claim · model-written summary
Martello® likely protects photosynthesis in chilli pepper under heat stress.
Verbatim
t0“heat stress tolerance of chilli pepper”
e4“Martello® efficiently reduced oxidative stress in leaves when compared to the untreated plants or EME, maintaining a high expression of HSFA2 and HSP101 in leaves and flowers after 15 days of stress”
e5“likely protecting photosynthesis and increasing fructose in leaves by 48%”
Claim · model-written summary
Martello® increased the number of xylem vessel elements in the main stem of chilli pepper by 35%.
- Taxon
- chilli pepperse6
- Organ / stage
- main steme6
- Treatment
- Martello®e6
- Outcome
- number of xylem vessel elementse6
- Direction
- increasede6
- Value
- 35e6
Not reportedComparator
Verbatim
t0“heat stress tolerance of chilli pepper”
e6“Moreover, Martello® increased the number of xylem vessel elements and ray parenchyma in the main stem of chilli peppers by 35 and 60% respectively, improving water transport and the storage of starch”
Claim · model-written summary
Martello® increased ray parenchyma in the main stem of chilli pepper by 60%.
- Taxon
- chilli pepperse6
- Organ / stage
- main steme6
- Treatment
- Martello®e6
- Outcome
- ray parenchymae6
- Direction
- increasede6
- Value
- 60%e6
Not reportedComparator
Verbatim
t0“heat stress tolerance of chilli pepper”
e6“Moreover, Martello® increased the number of xylem vessel elements and ray parenchyma in the main stem of chilli peppers by 35 and 60% respectively, improving water transport and the storage of starch”
Claim · model-written summary
Martello® may improve water transport and starch storage in chilli pepper through more xylem vessel elements and ray parenchyma.
Verbatim
t0“heat stress tolerance of chilli pepper”
e6“Moreover, Martello® increased the number of xylem vessel elements and ray parenchyma in the main stem of chilli peppers by 35 and 60% respectively, improving water transport and the storage of starch”
Claim · model-written summary
Martello® with high temperature exposure gave a 50% yield increase in chilli pepper.
- Taxon
- chilli peppert0
- Treatment
- Martello®e7
- Outcome
- yielde7
- Direction
- increasee7
- Value
- 50%e7
- Qualifier
- exposed to high temperaturese7
Not reportedComparator
Verbatim
t0“heat stress tolerance of chilli pepper”
e7“All these parameters combined led to a 50% yield increase in plants treated with Martello® and exposed to high temperatures, while no improvement was observed after the EME treatment”
Claim · model-written summary
The EME treatment gave no yield improvement in chilli pepper exposed to high temperatures.
Not reportedComparator
Verbatim
t0“heat stress tolerance of chilli pepper”
e7“All these parameters combined led to a 50% yield increase in plants treated with Martello® and exposed to high temperatures, while no improvement was observed after the EME treatment”
Claim · model-written summary
HSFA2 and HSP101 are biomarkers of Martello® efficacy in chilli pepper.
Verbatim
t0“heat stress tolerance of chilli pepper”
e0“Integrated trait and gene analyses revealed HSFA2 and HSP101 as biomarkers of efficacy”
The same questions in other papers
botanical · yield · Capsicum (peppers)Positive and negative results
1 paper in the same direction as this paper · 30 in the opposite direction
- positive
- positive
- positive
28 papers more in this group
See all 32 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.