Propagation of 1/2 " stage Zantedeschia corms from tissue cultured plantlets
Year: 1987
Type: dissertation
Abstract: The objective of this study was to obtain information towards the establishment of tissue culture, rooting and greenhouse treatments by which to propagate 1/2'' stage Zantedeschia corms. Photosynthesis, stomatal conductance and rooting were measured in five cultivars grown on media containing growth hormone Benzyladenine (BA), at 3 mg 1⁻¹ (high BA) or 0.3 mg 1⁻¹ (low BA) in the final in vitro stage, and under ambient or 65 µmol s⁻¹ m⁻² (supplementary) PAR during rooting. Then, photosynthesis and growth of high and low BA plants greenhouse-grown under ambient, 90 µmol s⁻¹ m⁻² (moderate) and 180 µmol s⁻¹ m⁻² (high) PAR were measured. Low BA plants rooted better than high BA plants, but did not demonstrate better subsequent growth. High BA plants, possibly as a reaction to initial inhibition, demonstrated pronounced growth in response to increased greenhouse light intensities and resulting surplus dry matter was in some cases partitioned to corm rather than foliage development. In low BA plants, even though photosynthetic rates were higher, the response was not as pronounced and preferential partitioning of dry matter did not occur. Supplementary light had little or no effect on rooting. At least two cultivars demon- strated differing balances between inherent photosynthetic capacity and foliage production to achieve similar levels of corm development. Changes in photosynthesis caused by treatments were attributed in part to changes in stomatal conductance.
Source: AcadiaU-DEV
DOI: 10.26108/ret0-xv81
Author: Frizzle, John Garth
Language: English
Subfield: Plant Science
Domain: Life Sciences
SDG: Zero hunger
Open Access status: green
OpenAlex ID: W7109822120