Mutual sanctions

Article Abstract:

Study of bacterial nodules found on legumes reveals a symbiotic relationship in which the bacteria process nitrogen gas for the plant's benefit, and the plant provides the bacteria with the products of photosynthesis. The article details the mechanisms of this relationship, and concludes that the research will provide important clues as to why some legumes do not nodulate, and why the relationship sometimes turns pathogenic.

Cash grains, not elsewhere classified, Dry Pea and Bean Farming, Pulses, Symbiosis, Bacteria, Legumes, Mimosaceae, Beans

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Chloroplast to nucleus communication triggered by accumulation of Mg-protoporphyrinIX

Article Abstract:

An accumulation of Mg-protoporphyrin (Mg-ProtoIX) acts as a signal from chloroplasts to the nucleus in plant cells, according to researchers in the US and Japan. The accumulation of Mg-ProtoIX regulates the expression of nuclear genes coding for proteins associated with photosynthesis.

United States, Japan, Cellular Biology, Cytology, Plant physiology, Photosynthesis

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Direct measurement of the transfer rate of chloroplast DNA into the nucleus

Article Abstract:

Plant biologists have determined the transfer rate of chloroplast DNA (cpDNA) into cell nuclei in tobacco plants. The article concludes that the transposition rate of cpDNA was one in 16,000 pollen grains, which shows major consequences for existing nuclear genes.

Genetic aspects

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