By Nathalie Munier-Jolain, Veronique Biarnes, Isabelle Chaillet
Rich in bibliographic references, this e-book offers the present prestige of information at the body structure of the pea crop. It attracts on contributions from plant physiologists and researchers in quite a few different disciplines who've been operating jointly for a few years at the creation of crops wealthy in proteins. The textual content first discusses vegetative and reproductive improvement, progress less than non-limiting stipulations, and the nitrogen nutrients of the pea crop. It then explores the consequences of the abiotic and biotic stresses at the improvement in addition to the expansion and nitrogen uptake by means of the plant. The booklet concludes with an international version of the functioning of the pea crop, that's proposed as a device for the prognosis of the yield-limiting factors.
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Additional info for Physiology of the Pea Crop
Example text
It is thus the dynamics of division and cellular expansion of this tissue which condition the expansion kinetics of the leaf. During approximately the first two-thirds of leaf expansion, the number of epidermic cells increases exponentially without a corresponding increase in cell size (fig. 4). This period corresponds to an active phase of cellular division at a constant rate when expressed in thermal time. e. approximately four days at 20°C. After this phase of cellular proliferation, there is a short transition phase where the rate of cellular divisions slows down, while cell size starts to increase.
These data are proposed as an example but cannot be generalized because of the huge genotypic and environmental variability (architectural type and growth conditions). Branch emergence 31 Main stem R2 R1 R4 R4p R3 Identify a leaf. 12. Simplified diagram of a pea plant allowing to precise the nomenclature used to identify the present axes. , 1992) and are rarely present on reproductive nodes. The frequency of lateral axes along the vegetative nodes exhibits genotypic variability (Jeudy, 2001). The number of lateral buds on the main stem is maximal for the nodes located at the base of the stem (up to 4 buds per node) and decreases to one (sometimes 0 according to the genotype) for the upper vegetative nodes.
10). , 1997). 10. Diagram of the reproductive development model of a pea stem. This formalism allows to define 4 phases characterized or not by different sinks in competition for assimilates. • Rates of progression of reproductive stages along the stem The later the reproductive stage (from flowering to physiological maturity) the higher is the progression rate. In the same way the rate of leaf expansion is less than that of flowering (cf. fig. 3). , 1993) because the rate of progression of flowering is hardly sensitive to the plant growth rate (Ney and Turc, 1993).