1941
DOI: 10.1080/03683621.1941.11513561
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Unfruitfulness In Black Currants

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“…Finally, there remains the difficulty that even after the pollen tubes have reached the ovary and ovules, fertilization may fail to occur for some obscure reason. To mention one example, when the flowers of Ribes nigrum are self -pollinated, the pollen tubes enter the ovules and "even lay themselves against the embryo-sac nucleus" but the male and female nuclei do not fuse and hence no seeds are formed (Ledeboer and Rietsema, 1940). Since there is no known method of overcoming this trouble, it is not necessary to discuss the point further.…”
Section: Introduction To Embryology Of Anoiospermsmentioning
confidence: 99%
“…Finally, there remains the difficulty that even after the pollen tubes have reached the ovary and ovules, fertilization may fail to occur for some obscure reason. To mention one example, when the flowers of Ribes nigrum are self -pollinated, the pollen tubes enter the ovules and "even lay themselves against the embryo-sac nucleus" but the male and female nuclei do not fuse and hence no seeds are formed (Ledeboer and Rietsema, 1940). Since there is no known method of overcoming this trouble, it is not necessary to discuss the point further.…”
Section: Introduction To Embryology Of Anoiospermsmentioning
confidence: 99%