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FURTHER EVIDENCE FOR THE UPWARD TRANSPORT OF MINERALS THROUGH THE PHLOEM OF STEMS
Author(s) -
Gustafson Felix G.,
Darken Marjorie
Publication year - 1937
Publication title -
american journal of botany
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.218
H-Index - 151
eISSN - 1537-2197
pISSN - 0002-9122
DOI - 10.1002/j.1537-2197.1937.tb09156.x
Subject(s) - citation , phloem , biology , library science , botany , computer science
that the FUCU8 egg cell contains growth substance in a much higher concentration than the vegetative cells of the plant. With the use of a special technique of applying growth substances to a small portion of a single egg cell, it was shown that the polarity of the egg cell can be regulated by growth substances. In this technique egg cells were placed over the bore of vertical micro-capillaries filled with growth substance. The rhizoid of the egg cell originated toward the capillary, whereas the origination of rhizoids in egg cells on control capillaries was at random. It appears that the growth substance not only is present in the egg cell of FUCU8 but that it plays an important role in its polarity, in the so-called "group effect" as well as in other responses.