Abstract
Problems with reduced yields owing to poor pollination where tomatoes are grown out-of-season in low cost greenhouses, motivated this study. Greenhouse tomatoes were planted in acid washed river sand. Four balanced nutrient solutions, with different boron (B) levels (0.02; 0.16; 0.32 and 0.64 mg l−1), were applied. The second flower cluster was covered with a transparent plastic bag and three relative humidity (RH) levels were applied to the isolated clusters. Dry (<10% RH) normal (60–75% RH) and moist (85–97% RH) air was constantly blown into the bags at ± 50 ml min−1. As a third factor at two levels, some of the clusters were vibrated daily with an electric vibrator (Poli-bee) and the controls not. The number of flowers per cluster, fruits per cluster, fruit set, weight of the cluster (yield), average fruit weight, seed production, fruit weight per number of seeds formed and fruits with blossom-end-rot (BER) were evaluated. Higher B-levels improved fruit set where trusses were not vibrated. A high RH reduced the number of seeds that developed per cluster, lowered cluster weights and the number of fruits per cluster and increased the incidence of BER. More BER developed on bigger fruit. Fruit set improved with cluster vibration, associated with more seeds and bigger fruit, especially under less humid con- ditions.
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Claims 9
Claim · model-written summary
Higher boron improved fruit set in non-vibrated tomato trusses.
- Taxon
- tomatoes
Solanum lycopersicumt0 - Treatment
- Higher B-levelse0
- Outcome
- fruit sete0
- Direction
- improvede0
- Qualifier
- where trusses were not vibratede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Higher B-levels improved fruit set where trusses were not vibrated.”
t0“greenhouse tomatoes”
Claim · model-written summary
High relative humidity reduced seeds per cluster.
- Taxon
- tomatoesSolanum lycopersicumt0
- Treatment
- high RHe0
- Outcome
- number of seeds that developed per clustere0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A high RH reduced the number of seeds that developed per cluster, lowered cluster weights and the number of fruits per cluster and increased the incidence of BER.”
t0“greenhouse tomatoes”
Claim · model-written summary
High relative humidity lowered cluster weight.
- Taxon
- tomatoesSolanum lycopersicumt0
- Treatment
- high RHe0
- Outcome
- cluster weightse0
- Direction
- lowerede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A high RH reduced the number of seeds that developed per cluster, lowered cluster weights and the number of fruits per cluster and increased the incidence of BER.”
t0“greenhouse tomatoes”
Claim · model-written summary
High relative humidity lowered fruits per cluster.
- Taxon
- tomatoesSolanum lycopersicumt0
- Treatment
- high RHe0
- Outcome
- number of fruits per clustere0
- Direction
- lowerede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A high RH reduced the number of seeds that developed per cluster, lowered cluster weights and the number of fruits per cluster and increased the incidence of BER.”
t0“greenhouse tomatoes”
Claim · model-written summary
High relative humidity increased blossom-end rot incidence.
- Taxon
- tomatoesSolanum lycopersicumt0
- Treatment
- high RHe0
- Outcome
- incidence of BERe0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A high RH reduced the number of seeds that developed per cluster, lowered cluster weights and the number of fruits per cluster and increased the incidence of BER.”
t0“greenhouse tomatoes”
Claim · model-written summary
Bigger fruit developed more blossom-end rot.
- Taxon
- tomatoesSolanum lycopersicumt0
- Organ / stage
- bigger fruite0
- Outcome
- BERe0
- Direction
- Moree0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“More BER developed on bigger fruit.”
t0“greenhouse tomatoes”
Claim · model-written summary
Cluster vibration improved fruit set, especially under less humid conditions.
- Taxon
- tomatoesSolanum lycopersicumt0
- Treatment
- cluster vibratione0
- Outcome
- Fruit sete0
- Direction
- improvede0
- Qualifier
- especially under less humid con- ditionse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fruit set improved with cluster vibration, associated with more seeds and bigger fruit, especially under less humid con- ditions.”
t0“greenhouse tomatoes”
Claim · model-written summary
Improved fruit set under vibration was associated with more seeds.
- Taxon
- tomatoesSolanum lycopersicumt0
- Treatment
- cluster vibratione0
- Outcome
- seedse0
- Direction
- moree0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fruit set improved with cluster vibration, associated with more seeds and bigger fruit, especially under less humid con- ditions.”
t0“greenhouse tomatoes”
Claim · model-written summary
Improved fruit set under vibration was associated with bigger fruit.
- Taxon
- tomatoesSolanum lycopersicumt0
- Treatment
- cluster vibratione0
- Outcome
- fruite0
- Direction
- biggere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fruit set improved with cluster vibration, associated with more seeds and bigger fruit, especially under less humid con- ditions.”
t0“greenhouse tomatoes”
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