ISSN:
1432-2048
Keywords:
Pollen tubes
;
Growth current
;
Potassium leak
;
Proton pump
;
Lilium
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Abstract Growing lily (Lilium longiflorum Thunb.) pollen always drive a current into their tubes and out of their grains. The only external ions needed for growth (and the growth current) are K+, H+, and Ca2+. Increases in K+ immediately stimulate the current; while decreases in K+ immediately inhibit it. Comparable changes in H+ have the opposite effect; while those in Ca2+ have very little effect. We infer that most of the steady growth current is carried in by a potassium leak and out by a proton pump; but other considerations indicate that a minor, but controlling, component of the inward current consists of calcium ions.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00385998
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