Journal
SCIENCE ADVANCES
Volume 2, Issue 10, Pages -Publisher
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/sciadv.1600554
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Funding
- Precursory Research for Embryonic Science and Technology [13416724]
- Japan Science and Technology Agency
- Japanese Society for the Promotion of Science [25840106]
- JSPS Fellowship [25009285]
- Japan Advanced Plant Science Network
- JSPS KAKENHI [16H06465]
- Japan Science and Technology Agency [15657559, 15665754]
- Grants-in-Aid for Scientific Research [25840106, 15K14541, 16H06173, 16H01465, 16H06465] Funding Source: KAKEN
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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 and causes an enlargement of ovules without fertilization. We termed this phenomenon as pollen tube-dependent ovule enlargement morphology and placed it between pollen tube guidance and double fertilization. Additionally, PTC increases endosperm nuclei without fertilization when combined with autonomous endosperm mutants. This finding could be applied in agriculture, particularly in enhancing seed formation without fertilization in important crops.
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