k Fern sporangia in sorus, light micrograph Fern sporangia in sorus, light micrograph. Sporophyte is a dominant phase of life cycle in vascular seedless plants like ferns. Spore producing process takes place in sporangium. Sporangia are born on lower side of fern leaves and are arranged in clusters called sori sing. sorus. In mature sporangium, special layer of cells with unevenly thickened walls called annulus orange helps in sporangium dehiscing splitting of plant structure along in builtweakness and spore releasing. This sample has been imaged using autofluorescence under ultraviolet UV light. Magnification x65 when printed 10 centimeters wide., by MAGDA TURZANSKA SCIENCE PHOTO LIBRARY Stock Photo - Afloimages
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Fern sporangia in sorus, light micrograph Fern sporangia in sorus, light micrograph. Sporophyte is a dominant phase of life cycle in vascular seedless plants like ferns. Spore producing process takes place in sporangium. Sporangia are born on lower side of fern leaves and are arranged in clusters called sori  sing. sorus . In mature sporangium, special layer of cells with unevenly thickened walls called annulus  orange  helps in sporangium dehiscing  splitting of plant structure along in built weakness  and spore releasing. This sample has been imaged using autofluorescence under ultraviolet  UV  light. Magnification: x65 when printed 10 centimeters wide., by MAGDA TURZANSKA   SCIENCE PHOTO LIBRARY
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Fern sporangia in sorus, light micrograph

Fern sporangia in sorus, light micrograph. Sporophyte is a dominant phase of life cycle in vascular seedless plants like ferns. Spore producing process takes place in sporangium. Sporangia are born on lower side of fern leaves and are arranged in clusters called sori (sing. sorus). In mature sporangium, special layer of cells with unevenly thickened walls called annulus (orange) helps in sporangium dehiscing (splitting of plant structure along in built-weakness) and spore releasing. This sample has been imaged using autofluorescence under ultraviolet (UV) light. Magnification: x65 when printed 10 centimeters wide., by MAGDA TURZANSKA / SCIENCE PHOTO LIBRARY

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