Improved Berry Set, Ovule Development and Pollen Tube Penetration in 'Kyoho' Grapevines in Ningxia.

Pollen tube contents initiate ovule enlargement and enhance seed coat development without fertilization

In angiosperms, pollen tubes carry two sperm cells toward the egg and central cells to complete double fertilization. In animals, not only sperm but also seminal plasma is required for proper fertilization. However, little is known regarding the function of pollen tube content (PTC), which is analogous to seminal plasma. We report that the PTC plays a vital role in the prefertilization state an...

The effect of supplementary hand pollination on fruit set and pollen tube growth in apple

Pollen histochemistry and pollen : ovule ratios in Zingiberaceae.

BACKGROUND AND AIMS Pollen grains of 37 species from 11 genera in the family Zingiberaceae were examined to assess qualitatively starch or lipid contents; the pollen grain and ovule numbers per flower and pollen : ovule ratios were also counted and calculated. Pollen : ovule ratios were studied to reveal patterns of variation in the Zingiberaceae. METHODS Freshly open flowers with dehiscing a...

Self-incompatibility in the Iranian Almond Cultivar ‘Mamaei’ Using Pollen Tube Growth, Fruit Set and PCR Technique

Self-incompatibility has been studied by using controlled pollination, pollen tube growth and PCR methods in the Iranian almond ‘Mamaei.’. Pollen tube growth and fruit set following self and cross-pollination treatments were evaluated. The percentage of initial and final fruit set was determined for each treatment at 30 and 60 days after controlled pollination. Pollen germination and pollen ...

Discovery of pollen tube-dependent ovule enlargement morphology phenomenon, a new step in plant reproduction

Ryushiro D. Kasahara, Michitaka Notaguchi, and Yujiro Honma PRESTO Kasahara Sakigake Project, Japan Science and Technology Agency (JST), Furo, Chikusa, Nagoya, Aichi, Japan; Institute of transformative bio-molecules, Nagoya University, Furo, Chikusa, Nagoya, Aichi, Japan; Graduate School of Science, Nagoya University, Furo, Chikusa, Nagoya, Aichi, Japan; PRESTO, JST, Furo, Chikusa, Nagoya, Aich...