Abstract
Five-year-old grapevines of Beauty Seedless spaced at 3 m × 3 m distance and trained on the 'Bower' system were sprayed with different plant bioregulators, namely, abscisic acid (ABA: 200 and 400 ppm), ethephon (200 and 400 ppm), benzothiadiazole (BTH: 0.3 and 0.6 mM), prohexadione-calcium (Pro-Ca: 200 and 400 ppm) and control (water spray) at the veraison stage during 2019-20 with the aim of studying their influence on berry physical and biochemical characteristics. The experiment was conducted in the randomised block design with three replications for each treatment. Different berry physical characteristics like weight, length, diameter and firmness were positively influenced with the different treatments except for ethephon (400 ppm) and ABA (400 ppm) treatments, which reduced the berry firmness significantly. Berry biochemical parameters were positively improved by almost all the plant bioregulators, they were most pronounced with ethephon (400 ppm) and ABA (400 ppm). The most prominent effects of ABA and ethephon treatments were noted on the total anthocyanins biosynthesis in the berries, which is major bottleneck under the warm subtropical conditions in different coloured grape genotypes. Hence, application of new generation plant bioregulators such as BTH, Pro-Ca, ABA and ethephon resulted in improvement in berry quality parameters of cv. Beauty Seedless.
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Claims 7
Claim · model-written summary
Bioregulators generally improved berry weight, length and diameter.
- Taxon
- grapet0
- Treatment
- different treatmentse0
- Outcome
- weight, length, diametere0
- Direction
- positively influencede0
Not reportedComparator
Verbatim
e0“Different berry physical characteristics like weight, length, diameter and firmness were positively influenced with the different treatments”
t0“grape cv. Beauty Seedless”
Claim · model-written summary
Ethephon at 400 ppm significantly reduced berry firmness.
Not reportedComparator
Verbatim
e0“ethephon (400 ppm) and ABA (400 ppm) treatments, which reduced the berry firmness significantly”
t0“grape cv. Beauty Seedless”
Claim · model-written summary
ABA at 400 ppm significantly reduced berry firmness.
Not reportedComparator
Verbatim
e0“ABA (400 ppm) treatments, which reduced the berry firmness significantly”
t0“grape cv. Beauty Seedless”
Claim · model-written summary
Almost all bioregulators improved berry biochemical parameters, most strongly with ethephon at 400 ppm.
- Taxon
- grapet0
- Treatment
- ethephon (400 ppm)e0
- Outcome
- Berry biochemical parameterse0
- Direction
- most pronouncede0
Not reportedComparator
Verbatim
e0“Berry biochemical parameters were positively improved by almost all the plant bioregulators, they were most pronounced with ethephon (400 ppm)”
t0“grape cv. Beauty Seedless”
Claim · model-written summary
ABA at 400 ppm had among the most pronounced improvements in berry biochemical parameters.
Not reportedComparator
Verbatim
e0“Berry biochemical parameters were positively improved by almost all the plant bioregulators, they were most pronounced with ethephon (400 ppm) and ABA (400 ppm)”
t0“grape cv. Beauty Seedless”
Claim · model-written summary
ABA had a prominent effect on total anthocyanin biosynthesis in berries.
Not reportedComparatorDirection
Verbatim
e0“most prominent effects of ABA and ethephon treatments were noted on the total anthocyanins biosynthesis in the berries”
t0“grape cv. Beauty Seedless”
Claim · model-written summary
Ethephon had a prominent effect on total anthocyanin biosynthesis in berries.
Not reportedComparatorDirection
Verbatim
e0“most prominent effects of ABA and ethephon treatments were noted on the total anthocyanins biosynthesis in the berries”
t0“grape cv. Beauty Seedless”
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