Ribulose Bisphosphate Carboxylase Activity in Anther-Derived Plants of <i>Saintpaulia ionantha</i> Wendl. Shag

Bhaskaran, Shyamala; Smith, Roberta H.; Finer, John J.

doi:10.1104/pp.73.3.639

Cited by 19 publications

(6 citation statements)

References 19 publications

(10 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…RuBPC activity per unit Chl is twice as great in tetraploid as in diploid plants produced from anther-derived plants of Saintpaulia ionantha (Bhaskaran et al 1983).…”

Section: Festuca Arundinacea (Tall Rescue C3 Allopolyploid)mentioning

confidence: 91%

Effects of polyploidy on photosynthesis

1993

View full text Add to dashboard Cite

In polyploid plants the photosynthetic rate per cell is correlated with the amount of DNA per cell. The photosynthetic rate per unit leaf area is the product of the rate per cell times the number of photosynthetic cells per unit area. Therefore, the photosynthetic rate per unit leaf area will increase if there is a less than proportional increase in cell volume at higher ploidal levels, or if cell packing is altered to allow more cells per unit leaf area. In autopolyploids (Medicago sativa, C3 species, and Pennisetum americanum, C4 species) there is a doubling of photosynthesis per cell and of cell volume in the tetraploid compared to the diploid. However, there is a proportional decrease in number of cells per unit leaf area with this increase in ploidy such that the rate of photosynthesis per leaf area does not change. There is more diversity in the relationship between ploidal level (gene dosage) and photosynthetic rates per unit leaf area in allopolyploids. This is likely to reflect the effects of natural selection on leaf anatomy, and novel genetic interactions from contributed genomes which can occur with allopolyploidy. In allopolyploid wheat (C3 species) a higher cell volume per unit DNA at the higher ploidal level is negatively correlated with photosynthesis rate per unit leaf area. Although photosynthesis per cell increases with ploidy, photosynthesis per leaf area decreases, being lowest in the allohexaploid, cultivated bread wheat (Triticum aestivum). Alternatively, doubling of photosynthetic rate per cell with doubling of DNA, with apparent natural selection for decreased cell volume per unit DNA, results in higher rates of photosynthesis per leaf area in octaploid compared to tetraploid Panicum virgatum (C4) which may be a case of allopolyploidy. Similar responses probably occur in Festuca arundinacea. Therefore, in some systems anatomical factors affecting photosynthesis are also affected by ploidal level. It is important to evaluate that component as well as determining the effect on biochemical processes. Current information on polyploidy and photosynthesis in several species is discussed with respect to anatomy, biochemistry and bases for expressing photosynthetic rates.

show abstract

“…RuBPC activity per unit Chl is twice as great in tetraploid as in diploid plants produced from anther-derived plants of Saintpaulia ionantha (Bhaskaran et al 1983).…”

Section: Festuca Arundinacea (Tall Rescue C3 Allopolyploid)mentioning

confidence: 91%

Effects of polyploidy on photosynthesis

1993

View full text Add to dashboard Cite

show abstract

“…Shag showed RuBPcase activities higher than that of parent plants. In contrast, all the cloned parent plants did not vary in their nuclear DNA content, chlorophyll and RuBPcase avtivity (21). The majority of plants regenerated from cultured cells of Datura innoxia Mill.…”

Section: Discussionmentioning

confidence: 88%

Variations in the Leaf Alkaloid Content of Androgenic Diploid Plants ofDatura innoxia

Hérouart¹,

Sangwan²,

Fliniaux³

et al. 1988

Planta Med

View full text Add to dashboard Cite

Anther culture of DATURA INNOXIA Mill, has permitted the obtention of spontaneous diploid androgenic plants which produced the tropane alkaloids. The source plants (zygotic diploid) showed no significant variations in the leaf alkaloid content. On the contrary, androgenic diploid plants obtained after the first cycle of androgenesis showed important quantitative and qualitative variations in the leaf alkaloid content. Thus, androgenesis was found to induce a large variation in the accumulation of these secondary metabolites in the leaves. It has also permitted the obtention of tropane alkaloid-overproductive plants, particularly rich in scopolamine. The analyses of zygotic plants obtained from seed germination of the first cycle androgenic plants have shown that this variability is transmissible by simple cross-pollination. The analyses of androgenic diploid plants obtained after the second cycle of androgenesis also showed variations in the leaf alkaloid content. IN VITRO androgenesis, therefore, clearly induced variability in the leaf alkaloid content of the androgenic plants. The role of IN VITRO androgenesis in inducing variability has been discussed.

show abstract

“…F., and C. sinense Willd. (Paek et al, 1990); african violet (Bhaskaran et al, 1983); and strawberry (Fragaria ×ananassa Duchesne) (Schwartz et al, 1981).…”

Section: Discussionmentioning

confidence: 99%

Variations in African Violet `Crimson Frost' Micropropagated by Homogenized Leaf Tissue Culture

Paek¹,

Hahn²

1999

horttech

View full text Add to dashboard Cite

Adventitious buds regenerated from homogenized leaf tissue of Saintpaulia ionantha Wendl. `Crimson Frost' were micropropagated to determine types and frequencies of the variants obtained. Plants grown for one year in a greenhouse showed 67% variation and 33% normality. A higher rate of variation was observed in leaf color rather than in leaf shape. The variations in leaf color and leaf shape were 67% and 19%, respectively. In regard to flower type, greater numbers of semidouble and double types were obtained as compared to single types. Both flower types showed a much higher rate of normal (mixed) color (81%) as compared to pink, red or white (19%). An sodium dodecylsulfate polyacrylamide gel electrophoresis profile of protein extracted from leaves of the stock plants and the variants indicated no difference between them and did not reflect the variation in phenotype.

show abstract

Ribulose Bisphosphate Carboxylase Activity in Anther-Derived Plants of Saintpaulia ionantha Wendl. Shag

Cited by 19 publications

References 19 publications

Effects of polyploidy on photosynthesis

Effects of polyploidy on photosynthesis

Variations in the Leaf Alkaloid Content of Androgenic Diploid Plants ofDatura innoxia

Variations in African Violet `Crimson Frost' Micropropagated by Homogenized Leaf Tissue Culture

Contact Info

Product

Resources

About