Proceedings of the American Society for Horticultural Science Volume 8-9

Proceedings of the American Society for Horticultural Science Volume 8-9

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1912 edition. Excerpt: ... oriented itself along three lines: (I) A determination of the best sugar solution as a culture medium for germinating peach pollen; (2) A determination of the effect of different applications of commercial fertilizer upon the longevity of the pollen; (3) A determination of the effect of different applications of commercial fertilizers upon the vigor of the germinating pollen tubes. The author realizes that he may be in error in assigning these differences to difference in receptivity of the stigma as it is possible that some other part or the ovary may be so modified either structurally or functionally as to account for differences in set of fruit. The term receptivity of the stigma has been used as one of convenience rather than as one of fact.. l Briefly stated, the different culture media used gave the following results: Five per cent dextrose was a poor germinating medium, pollen from many of the fertility blocks failing to germinate at all. There was also a great variation in the vigor of the pollen tubes, the majority of them however making only a weak growth. On a second test, four days after gathering the pollen, only two blocks showed any germination whatever. The growth was feeble in both cases and no new grains germinated after twenty-one hours. On a third test, seven days after gathering pollen, only a single block made any growth. The percentage of germination was low, ten per cent, and the growth was feeble. It was of interest to note, however, that this block was one that had been heavily fertilized with potash alone. On a fourth test, nine days after gathering the pollen, pollen from all the plots failed to germinate. Ten per cent. dextrose proved to be a much better culture medium for germinating peach pollen than five...show more

Product details

  • Paperback | 120 pages
  • 189 x 246 x 6mm | 227g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 1236990501
  • 9781236990501