Effects of Elevated Temperature on Nodule Development: I-Detailed Characteristic of Unusual Apical Senescence.

Despite global warming, the influence of heat on symbiotic nodules is scarcely studied. In this study, the effects of heat stress on the functioning of nodules formed by bv. strain 3841 on pea () line SGE were analyzed.

Effects of Elevated Temperature on Nodule Development: II-Phytohormonal Responses.

High temperature is one of the most important factors limiting legume productivity. We have previously shown the induction of senescence in the apical part of nodules of the pea SGE line, formed by bv. strain 3841, when they were exposed to elevated temperature (28 °C).

Efficacy of a Plant-Microbe System: (L.) Cadmium-Tolerant Mutant and Strains, Expressing Pea Metallothionein Genes and , for Cadmium Phytoremediation.

Two transgenic strains of bv. , 3841-PsMT1 and 3841-PsMT2, were obtained. These strains contain the genetic constructions and coding for two pea ( L.

Gibberellins Inhibit Nodule Senescence and Stimulate Nodule Meristem Bifurcation in Pea ( L.).

The development of nitrogen-fixing nodules formed during -legume symbiosis is strongly controlled by phytohormones. In this study, we investigated the effect of gibberellins (GAs) on senescence of pea () symbiotic nodules. Pea wild-type line SGE, as well as corresponding mutant lines SGEFix-1 (), SGEFix-2 (), SGEFix-3 (), and SGEFix-7 (), blocked at different stages of nodule development, were used in the study.

Early nodule senescence is activated in symbiotic mutants of pea (Pisum sativum L.) forming ineffective nodules blocked at different nodule developmental stages.

Plant symbiotic mutants are useful tool to uncover the molecular-genetic mechanisms of nodule senescence. The pea (Pisum sativum L.) mutants SGEFix-1 (sym40), SGEFix-3 (sym26), and SGEFix-7 (sym27) display an early nodule senescence phenotype, whereas the mutant SGEFix-2 (sym33) does not show premature degradation of symbiotic structures, but its nodules show an enhanced immune response.