Programmed cell death in seeds of angiosperms Discovery of the Asexual Reproduction Genetic law of Plant LOCALIZATION OF ACID PHOSPHATASE ACTIVITY DURING DEVELOPMENT OF MEGAGAMETOPHYTE IN WHEAT THE ELECTRON MICROSCOPE OBSERVATIONS ON THE STRUCTURE AND FUNCTION OF THE NUCELLUS IN NITRARIA SIBIRICA PALL. Observation on the Characteristic Features of Cell Wall Formation in Free-Nuclear Endosperm During the Early Stages of Cellularization in Triticum aestivum Ovular development and perisperm formation of Phytolacca americana (Phytolaccaceae) and their systematic significance in Caryophyllales ULTRASTRUCTURAL OBSERVATION ON PROGRAMMED CELL DEATH OF NUCELLUS IN PENNISETUM SQUAMULATUM A New Method to Isolate Non-Enzymatically the Nucellus of Populus tomentosa