Showing papers on "Portulaca published in 1972"
TL;DR: Six species having characteristics of plants with the C(4) dicarboxylic photosynthetic pathway, Echinochloa utilis L. Ohwi et Yabuno, Kyllinga brevifolia Rottb.
Abstract: Six species having characteristics of plants with the C(4) dicarboxylic photosynthetic pathway, Echinochloa utilis L Ohwi et Yabuno (Japanese millet), Cynodon dactylon L (Bermuda grass), Kyllinga brevifolia Rottb, Amaranthus tricolor L cv Early splendour, Kochia childsii Hort, and Portulaca grandiflora Hook (rose moss), responded decisively to 01 milliequivalent per liter NaCl supplied to their culture solutions initially containing less than 008 microequivalent per liter Na Chlorosis and necrosis occurred in leaves of plants not receiving sodium Portulaca failed to set flower in the sodium-deficient cultures Under similar conditions Poa pratensis L (Kentucky blue grass) having characteristics of the C(3) photosynthetic pathway made normal growth and did not respond to the addition of sodium It is concluded from these results and previously reported work that sodium is generally essential for species having the C(4) pathway but not for species with the C(3) pathway
177 citations
TL;DR: Karyological studies were made on three species of Portulaca, the evolution of karyotype, the relation between basic numbers and life forms, and the possibility of interspecific hybridization between P. grandiflora and P. pilosa were discussed.
Abstract: Karyological studies were made on three species of Portulaca : P. grandiflora, P. “Jewel” and P. pilosa. From the obserbation, the evolution of karyotype, the relation between basic numbers and life forms, and the possibility of interspecific hybridization between P. grandiflora and P. “Jewel” were discussed.
4 citations
TL;DR: In the annual ornamental Portulaca grandiflora the usual number is 9, but in one cultivar Jewel' it is n = 5, which means the former is phenotypically and genetically very heterogeneous but cytologically uniform, while the latter is phenotypesically uniform but cytogenenetically heterogeneous.
Abstract: SUMMARYIn the annual ornamental Portulaca grandiflora the usual number is n = 9, but in one cultivar Jewel' it is n = 5. The former is phenotypically and genetically very heterogeneous but cytologically uniform, while the latter is phenotypically uniform but cytogenenetically heterogeneous with 1 or 2 interchange complexes of 4 chromosomes. These have a directed segregation and therefore high fertility. However, homozygotes although with 5 II have segregational irregularities and high degree of sterility.
2 citations
1 Jan 1972
TL;DR: Sixspecies havingcharacteristics ofplants with theC4dicarboxylic photosynthetic pathway, Echinochloa utilis L.Ohwi etYabuno(Japanese millet), Cynodondactylon L.(Bermuda grass), Kyllinga brevifolia Rottb.
Abstract: Sixspecies havingcharacteristics ofplants withtheC4dicarboxylic photosynthetic pathway, Echinochloa utilis L.Ohwi etYabuno(Japanese millet), Cynodondactylon L.(Bermuda grass), Kyllinga brevifolia Rottb., Amaranthus tricolor L.cv. Earlysplendour, Kochiachildsii Hort., andPortulaca grandiflora Hook (rosemoss),responded decisively to0.1miliequivalent perliter NaClsupplied totheirculture solutions initially containing less than0.08microequivalent perliter Na. Chlorosis andnecrosis occurred inleaves ofplants notreceivingsodium. Portulaca failed tosetflower inthesodium-deficient cultures. Undersimilar conditions Poapratensis L. (Kentucky bluegrass) havingcharacteristics oftheC3photosynthetic pathwaymadenormalgrowthanddidnotrespond totheaddition ofsodium. Itisconcluded fromthese results and previously reported workthatsodiumisgenerally essential for species having theC4pathway butnotforspecies withtheC3 pathway.