1988
DOI: 10.1111/j.1399-3054.1988.tb00637.x
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Effect of drought, on transport and metabolism of abscisic acid in aeroponically grown Helianthus annuus

Abstract: The effect of drought on transport and metabolism of radioactive abscisic acid (ABA) in roots and shoots of sunflower (Helianthus annuus L. cv. Russian) was observed. Radioactivity from ABA moved freely all over the plants. Young shoot tissues, such as the growing apical bud or axillary buds released from apical dominance, were strong sinks for ABA. Mature tissues were effective exporters. Drought‐induced alterations in the pattern of transport of radioactivity do not appear to be a major factor in the control… Show more

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Cited by 15 publications
(5 citation statements)
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References 37 publications
(29 reference statements)
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“…The ABA distribution and levels determined for unstressed plants (Tab. 2) agree with the results obtained in aeroponically grown sunflower (Hubick and Reid 1988). ABA accumulated mainly in the apical bud whereas the lower contents were found in roots with intermediate levels in leaves.…”
Section: Discussionsupporting
confidence: 90%
See 1 more Smart Citation
“…The ABA distribution and levels determined for unstressed plants (Tab. 2) agree with the results obtained in aeroponically grown sunflower (Hubick and Reid 1988). ABA accumulated mainly in the apical bud whereas the lower contents were found in roots with intermediate levels in leaves.…”
Section: Discussionsupporting
confidence: 90%
“…Brutor piants pollinated by fertile Brutor, segregating 1/1 transformed to nontransformed, were sown in a greenhouse. Five-day-old plants were planted in a sand mixture, prior to aeroponic culture (Hubick and Reid 1988) when 22 days old. The roots were washed and the cotyledons plus the first or the first and second leaves were removed (and kept for DNA extraction).…”
Section: Culture Conditionsmentioning
confidence: 99%
“…In contrast, the contribution of root-sourced ABA is still a matter of debate (Neales & McLeod 1991;Slovik, Daeter & Hartung 1995;Jokhan, Else & Jackson 1996). ABA that reaches the guard cells can originate not only from root biosynthesis, but also from uptake of rhizospheric ABA (Slovik et al 1995), synthesis in other plants tissues including guard cells themselves (Cornish & Zeevaart 1986), redistribution between leaf compartments or recycling through the whole plant via the phloem (Hoad 1975;Hubick & Reid 1988;Wolf, Jeschke & Hartung 1990). Additionally, root-sourced or recycled shoot-sourced ABA can be sequestered away from the transpiration stream following stress-induced pH shifts in plant compartments Wilkinson & Davies 1997).…”
Section: Introductionmentioning
confidence: 99%
“…As part of ongoing studies on the role of GAs and other hormones in control of growth and development in Helianthus (4,5,17), we have investigated GA metabolism and its interaction with ethylene in sunflower seedlings. We have used ethylene as a tool to modify elongation in our investigation of GA metabolism.…”
mentioning
confidence: 99%