Globoid (botany)

File:Crystalloids and globoids.png

A globoid is a spherical crystalline inclusion in a protein body found in seed tissues that contains phytate and other nutrients for plant growth. These are found in several plants, including wheat and the genus Cucurbita. These nutrients are eventually completely depleted during seedling growth.{{cite journal|last1=Beecroft|first1=Penny|last2=Lott|first2=John N. A.|title=Changes in the Element Composition of Globoids From Cucurbita maxima and Cucurbita andreana Cotyledons During Early Seedling Growth|journal=Canadian Journal of Botany|volume=74|issue=6|year=1996|pages=838–847|doi=10.1139/b96-104 }}{{cite journal|last1=Spitzer|first1=Ernest|last2=Webber|first2=Mel|last3=Lott|first3=John N. A.|title=Elemental Composition of Globoid Crystals in Protein Bodies of Wheat Grain Grown on Soil Treated with Sewage Sludge|journal=Canadian Journal of Botany|volume=59|issue=3|year=1981|pages=403–409|doi=10.1139/b81-055}} In Cucurbita maxima, globoids form as early as the 3rd day of seedling growth.{{cite journal|last1=Pitt|first1=Michael W.|last2=Lott|first2=John N. A.|title=Large Globoid Particles in the Cotyledons of Cucurbita maxima Seedlings|journal=Canadian Journal of Botany|volume=74|issue=7|year=1996|pages=1186–1189|doi=10.1139/b96-141}} They are located in conjunction with a larger crystalloid.{{cite book|last=Pollock|first=James Barkley|title=Laboratory Directions for Elementary Botany|url=https://archive.org/details/laboratorydirec00pollgoog|publisher=George Wahr Publishing|year=1922|page=[https://archive.org/details/laboratorydirec00pollgoog/page/n33 29]|location=Ann Arbor, MI}} They are electron–dense and vary widely in size.{{cite journal|last=Lott|first=John N. A.|title=Protein Bodies in Seeds|journal=Nordic Journal of Botany|volume=1|issue=3|year=2008|pages=421–432|doi=10.1111/j.1756-1051.1981.tb00708.x}}