Abstract
High temperatures during flowering frequently limit yields of some bell pepper cultivars in New York fields. Previous research has shown that subjecting the plants to low light at flowering can have similar effects. To determine if cultivar differences in flower abscission and yield could be accentuated by such a shade stress, field plots of six cultivars were subjected to 1 week of low light during flowering. Shade cloth tunnels were erected over the plant rows in two experiments, reducing incident light by 80%. Nondestructive abscission counts were taken at the start, and 7 days after the end of a 7-day shade period. Mature green fruit were harvested periodically. Low light stress resulted in 68% and 86% abscission at the first three fruiting nodes in 1992 and 1994, respectively. Cultivars showed differential abscission in unshaded plots, and after shade, producing a significant cultivar: shade interaction. `Ace' showed least abscission and maintained yields with shading; `Camelot' lost nearly all flowers and buds with low light stress, and was reduced by 75% and 91% in marketable yield in 1992 and 1994, respectively. Results indicate that shade stress accentuates abscission susceptibility in bell pepper cultivars. Pepper lines selected for low light tolerance may show promise in resisting flower abscission at high temperature.
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Claims 6
Claim · model-written summary
Low light stress during flowering resulted in increased flower abscission at the first three fruiting nodes, 68% and 86% in 1992 and 1994.
Verbatim
e0“some bell pepper cultivars in New York fields”
e1“Low light stress resulted in 68% and 86% abscission at the first three fruiting nodes in 1992 and 1994, respectively”
e4“Cultivars showed differential abscission in unshaded plots”
Claim · model-written summary
Ace showed the least abscission with shading.
Not reportedComparator
Verbatim
e0“some bell pepper cultivars in New York fields”
e2“`Ace' showed least abscission and maintained yields with shading”
Claim · model-written summary
Ace maintained its yields with shading.
Not reportedComparator
Verbatim
e0“some bell pepper cultivars in New York fields”
e2“`Ace' showed least abscission and maintained yields with shading”
Claim · model-written summary
Cultivar and shade interacted significantly for abscission.
Not reportedDirection
Verbatim
e0“some bell pepper cultivars in New York fields”
e4“Cultivars showed differential abscission in unshaded plots, and after shade, producing a significant cultivar: shade interaction”
Claim · model-written summary
Shade stress accentuates abscission susceptibility in bell pepper cultivars.
Verbatim
e4“Cultivars showed differential abscission in unshaded plots”
e5“Results indicate that shade stress accentuates abscission susceptibility in bell pepper cultivars”
Claim · model-written summary
Pepper lines selected for low light tolerance may resist flower abscission at high temperature.
Verbatim
e6“Pepper lines selected for low light tolerance may show promise in resisting flower abscission at high temperature”
The same questions in other papers
shade · yield · Capsicum annuum (sweet pepper)Results differ
11 papers in the same direction as this paper · 2 in the opposite direction · 1 reporting no difference from an alternative
- no effect
- negative
- no effect
11 papers more in this group
See all 15 papers →light · yield · Capsicum annuum (sweet pepper)Results differ
6 papers in the same direction as this paper · 15 in the opposite direction
- positive
- positive
- positive
18 papers more in this group
See all 22 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.