Radioactive gibberellin A(5) ((3)H-GA(5)) was synthesized from gibberellic acid. When it was applied to dwarf peas grown in the dark, an average of 3% was converted to another acid gibberellin within 48 hours. The biological activity of the metabolite did not account for the response to applied GA(5). GA(5) is therefore assumed to be biologically active per se.(3)H-GA(5) did not appear to form ...

Feed and food production are inter alia reasons for high greenhouse gas emissions. Greenhouse gas emissions could be reduced by the replacement of animal components with plant components in processed food products, such as pasta. The main components currently used for pasta are semolina, and water, as well as additional egg. The hypothesis of this paper is that the substitution of whole egg wit...

Purified pseudobactin inhibits the uptake of ferric iron by the roots of peas and maize plants sufficiently to reduce the synthesis of chlorophyll. This inhibition is interpreted as competitive binding, as described for synthetic chelating compounds.

A simple procedure for the preparation of plant cell protoplasts is described. The leaf is first treated with pectinase under conditions that do not liberate cells; cellulase is then used to release protoplasts. The yields are comparable to those obtained by methods that entail the prior preparation of free cells. The method is of general application but is particularly useful with tissues that...

Light-induced inhibition of stem growth is a common phenomenon in plants. Particularly well investigated is the case of peas, Pisum sativum, mainly thanks to the work of Lockhart. Lockhart showed that growth of Alaska peas, a tall variety, was retarded when plants were transferred from darkness to low-intensity light but that, after a period of inhibition, the plants resumed growth at a rate eq...

Lead, similar to other heavy metals and abiotic factors, causes many unfavorable changes at the subcellular and molecular levels in plant cells. An increased level of superoxide anion in Pisum sativum root cells treated with 1 mM Pb(NO3)2 evidenced oxidative stress conditions. We found increased activities of enzymatic components of the antioxidative system (catalase and superoxide dismutase) i...