Abstract
Effects of shoot vigor on the development of transmitting tissue (TT) and pollen tube growth in pistils of Pione grapevines (a hybrid of Vitis vinifera L. and V. labrusca L., tetraploid) were investigated anatomically. Shoot vigor was reduced by root zone restriction and pre-bloom shoot tipping, and was increased by severe winter pruning and application of high concentration fertilizer. The TT development in long and short shoots of the vines without root restriction was also compared. In cross sections of the upper and middle ovaries, a thicker TT and more pollen tubes were found in root zone-restricted vines compared to unrestricted vines. Also, thicker TT and more pollen tubes were observed in less vigorous, short shoots of unrestricted vines. Tipping did not improve the TT development. However, spur pruning and application of high concentration fertilizer to root zone-restricted vines did not inhibit the TT development and pollen tube growth, though shoots grew vigorously. From these results, we conclude that promoted TT development in less vigorous shoots of Pione grapevines allows for more pollen tubes to penetrate into the ovary, resulting in the production of acceptable clusters with a sufficient number of seeded berries.
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Claims 5
Claim · model-written summary
Root zone restriction produced thicker transmitting tissue and more pollen tubes than unrestricted vines.
Verbatim
e0“a thicker TT and more pollen tubes were found in root zone-restricted vines compared to unrestricted vines”
t0“grape”
Claim · model-written summary
Short, less vigorous shoots had thicker transmitting tissue and more pollen tubes.
Verbatim
e0“thicker TT and more pollen tubes were observed in less vigorous, short shoots of unrestricted vines”
t0“grape”
Claim · model-written summary
Tipping did not improve transmitting tissue development.
Not reportedComparator
Verbatim
e0“Tipping did not improve the TT development”
t0“grape”
Claim · model-written summary
Spur pruning and high concentration fertilizer did not inhibit transmitting tissue development or pollen tube growth.
- Taxon
- grapet0
- Treatment
- spur pruning and application of high concentration fertilizere0
- Outcome
- TT development and pollen tube growthe0
- Direction
- did not inhibite0
Not reportedComparator
Verbatim
e0“spur pruning and application of high concentration fertilizer to root zone-restricted vines did not inhibit the TT development and pollen tube growth”
t0“grape”
Claim · model-written summary
The authors infer that promoted transmitting tissue permits more pollen tubes to enter ovaries and adequate seeded berry clusters.
Verbatim
e0“promoted TT development in less vigorous shoots of Pione grapevines allows for more pollen tubes to penetrate into the ovary, resulting in the production of acceptable clusters with a sufficient number of seeded berries”
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See all 51 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.