The relation of auxin-induced pea stem growth to cyclic AMP treatment

Ockerse, Ralph; Mumford, Laura M.

doi:10.1007/bf00637359

Cited by 8 publications

(2 citation statements)

References 4 publications

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“…The transport (9) and distribution (3) pattern of cAMP in certain plant tissues is also similar to that of auxin. On the other hand some investigators report that cAMP alone does not promote growth in dwarf pea stems (18) very rapid promotion of elongation in Avena coleoptiles (7,21). In the present experiments, growth of 1-cm segments from coleoptiles of 4-to 5-day-old Avena sativa L. cv.…”

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confidence: 55%

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The Lack of Effect of Cyclic Adenosine 3′:5′-Monophosphate on Avena Coleoptile Growth

Edgerton¹,

Cline²,

Rehm³

1975

Plant Physiol.

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The effects of cyclic adenosine 3': 5'-monophosphate (cAMP) on the growth of Arena coleoptile segments over 4 to 10 hours were monitored with a position sensing transducer. At pH 6, cAMP (0.1 mM with and without 2.5 mM glucose; or 2 mM alone) or dibutyryl cAMP (0.1 mM) was added at the beginning of the experiment, or after about 1 hour or after about 6 or 7 hours. Under all conditions tested, cAMP compounds had little or no effect on coleoptile segment elongation. Inasmuch as cAMP does not duplicate the rapid and vigorous elongation obtained with 2 gM auxin, the hypothesis that cAMP is a mediator of auxin activity is not supported by experimental evidence in this system. This conclusion is dependent upon the assumption that the cAMP compounds penetrated the tissue.

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confidence: 55%

“…In some cases (18,24,27), no mention is made of pH control during the incubation, and in several others (4,11,12) a pH of 5 or 5.2 is mentioned. A pH of 5 is within the range for acid-promoting effects on segment elongation (8,10,20,22).…”

Section: Resultsmentioning

confidence: 99%