Changes in Weight, Nitrogen Accumulation, Respiration and Photosynthesis During Growth and Development of Seeds and Pods of Phaseolus Vulgaris

Abstract

The growth and development of pods and seeds of Phaseolus vulgaris are described by the following parameters: fresh and dry weight, length, ratio of fresh weight to length and nitrogen content. Pod and seed development are independent and sequential. Pod photosynthesis contributes only marginally to pod development, but may be significant in refixing CO2 released in respiration. Pods and seeds do not seem to act simply as competing sinks. Nitrogen accumulation in the seeds begins only when it has ceased in the pods. Ways in which regulation may be achieved are discussed. Manipulation of nitrogen fertilization to enhance seed growth is suggested.

Relationship between carbohydrate partitioning and drought resistance in common bean

“…3b), we explored the possibility that the drought effect on 14 C translocation from leaves into pods occurred before seed filling started. Hence, we analysed 14 C‐starch partitioning during pre‐filling stages; that is, using 1‐ and 2‐week‐old pods, which correspond to developmental stages where seeds are developing, before the beginning of the accumulation of reserves in the embryo (Oliker et al. 1978; Dejardin et al.…”

“…Two types of experiments were carried out to evaluate the effect of terminal drought on reproductive structures (pods) at filling and pre‐filling stages (Oliker, Poljakoff‐Mayber & Mayer 1978). To evaluate the effect of drought on seed filling stage, the plants were irrigated to field capacity until 4 d after flowering when watering was halted; subsequently, the plants were harvested when most of the pods were at the early (56 d after seeding, DAS), intermediate (60 DAS) or late stage (64 DAS) of seed filling, as indicated.…”

“…Two types of experiments were carried out to evaluate the effect of terminal drought on reproductive structures (pods) at filling and pre-filling stages (Oliker, Poljakoff-Mayber & Mayer 1978).To evaluate the effect of drought on seed filling stage, the plants were irrigated to field capacity until 4 d after flowering when watering was halted; subsequently, the plants were harvested when most of the pods were at the early (56 d after seeding, DAS), intermediate (60 DAS) or late stage (64 DAS) of seed filling, as indicated. Two treatments of terminal drought were applied.A severe drought (SD) treatment, where each pot was irrigated to reach 30% of the weight of the same pot at field capacity, or a moderate drought (MD), where pots were irrigated up to 60% of the weight of the same pot at field capacity.…”

“…3b), we explored the possibility that the drought effect on 14 C translocation from leaves into pods occurred before seed filling started. Hence, we analysed 14 C-starch partitioning during pre-filling stages; that is, using 1-and 2-week-old pods, which correspond to developmental stages where seeds are developing, before the beginning of the accumulation of reserves in the embryo (Oliker et al 1978;Dejardin et al 1997b;Borisjuk et al 2003). To verify the effect on plant development under the growth conditions imposed in these greenhouse experiments, we determined the flower and pod number during stress treatment in both cultivars (Fig.…”

Growth, sucrose synthase, and invertase activities of developing Phaseolus vulgaris L. fruits

“…The study was undertaken to investigate possible relationships between the sucrose-cleaving enzymes AI, SS and neutral invertase (NI), and the sink processes of carbon import, growth in size and accumulation of dry weight during bean fruit development. Temporal (DPA) and spatial (pod versus seed) patterns were studied in Phaseolus vulgaris fruits, whose development also has been characterized in other types of studies (Geiger et al, 1989;Loewenberger 1955;Oliker, Poljakoff-Mayber & Mayer 1978;Sage & Webster 1990;Walbot, Clutter & Sussex 1972). The activities of AI and SS differed between pods and seeds and also changed during development of each structure.…”