Growth and Development of Soybean (<i>Glycine max</i> [L.] Merr.) Pods

Quebedeaux, Bruno; Chollet, Raymond

doi:10.1104/pp.55.4.745

Cited by 76 publications

(43 citation statements)

References 9 publications

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“…This is in accord with reports of Hall et al (1972) and Crookston et al (1974) for other bean cultivars, and for soybeans (Quebedeaux and Chollet 1975). The main role of the photosynthetic apparatus present in the pod and seeds of the beans might be to refix CO2 released by respiration (Flinn and Pate 1970, Crookston et al 1974, Harvey et al 1976).…”

Section: Discussionsupporting

confidence: 79%

Histology and histochemistry of pericarp of grain legumes: Cajanus cajan, Vigna mungo and Vigna radiata.

Sehgal

Gandhi

1986

CYTOLOGIA

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Section: Discussionsupporting

confidence: 79%

Histology and histochemistry of pericarp of grain legumes: Cajanus cajan, Vigna mungo and Vigna radiata.

Sehgal

Gandhi

1986

CYTOLOGIA

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“…The pod of the legume provides a protective envelope to the developing seeds; it acts as catchment, transport link, and temporary reservoir for solutes mobilized from vegetative parts to seeds; and if green and illuminated, it functions significantly in photosynthetic fixation of CO2 (4,10). Recent work using garden pea (Pisum sativum L. cv.…”

mentioning

confidence: 99%

Photosynthetic Pod Wall of Pea (Pisum sativum L.)

et al. 1977

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The pod wail of pea (Pisum sativum L.) was shown to contain two distinct photosynthetic layers. The outer, comprising chlorenchyma of the mesocarp, captured CO2 from the outside atmosphere; the inner, a chloroplast-containing epidermis lining the pod gas cavity, was involved in photoassimilation of the CO, released from respiring seeds.Structural features of the pod induded the thick cutide and stomata of the outer epidermis, the inward projecting veinlets of the vascular network in the mesocarp, the sparsity of air spaces, the fiber and parenchyma layers of the endocarp, and the abundant chloroplasts, thin cutide, and rounded outer contours of cells of the inner epidermis.The inner epidermis showed high specific activities of ribulose 1,5-diphosphate (RuDP) carboxylase (EC 4.1.1.39) and phosphoenolpyruvate (PEP) carboxylase (EC 4.1.1.31), contained up to 20% of the pod's chlorophyll, and was capable of fixing 66% of the CO2 released during the photoperiod to the pod gas space by the seeds of a fully grown fruit.The in vitro carboxylation capacity of the pod exceeded the estimated gross photosynthesis of the fruit for all but the last few days of development. Chlorophyll content and carboxylation activity dedined more markedly in the outer photosynthetic layers than in the inner epidermis.The ratio of activities of RuDP carboxylase to PEP carboxylase in pod extracts varied from 2.4:1 to 12:1 as against 48:1 to 156:1 in extracts of leaves.Structural and physiological properties of the pod were related to its capacty to conserve respired CO2 and provide photosynthate to developing seeds.

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“…Young developing green fruits (4,5), immature pericarp of barley (8), grain and intact ears of wheat (9,16), and developing pods of bean (7), soybean (13), and pea (10) assimilate CO2 in the light and contribute as much as 50% of the photosynthate to the developing seed or fruit. The ability of the floral tissues to perform photosynthesis, however, is not well understood.…”

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confidence: 99%

Photosynthetic Activity in the Flower Buds of `Valencia' Orange (Citrus sinensis [L.] Osbeck)

Vu¹,

Yelenosky²,

Bausher³

1985

Plant Physiol.

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Flower buds of 'Valencia' orange (Citrus sinensis IL.] Osbeck) were able to fix`4C02 into a number of compounds in their own tissues under both light and dark conditions. The total incorporation, however, was about 4-fold higher in the light than in the dark. In the light, 50% of the total '4C label was found in the neutral fraction (sugrs), 22% in the basic fraction (amino acids), and 26% in the acid-1 fraction (organic acids). In the dark, about 95% of the "C label was incorporated into the basic and acid-1 fractions. Activities of ribulose bisphosphate carboxylase and phosphoenolpyruvate carboxylase (expressed in micromoles CO2 per milligram protein per hour) averaged 1.95 and 8.87 for the flower buds, and 28.5 and 3.6 for the leaves, respectively. The ability of orange flower buds to fix ambient CO2 into different compounds suggests that this CO2 assimilation may have some regulatory role during the early reproductive stages in determining citrus fruit initiation and setfing.Although photosynthetic activity has been reported in a number of reproductive plant organs, the flowers per se have been largely ignored in photosynthesis research. Young developing green fruits (4,5), immature pericarp of barley (8), grain and intact ears of wheat (9, 16), and developing pods of bean (7), soybean (13), and pea (10) assimilate CO2 in the light and contribute as much as 50% of the photosynthate to the developing seed or fruit. The ability of the floral tissues to perform photosynthesis, however, is not well understood.In the present investigation, we examined the capability of '4C02 incorporation and the activities of RuBPCase' and PEPCase in the flower buds of 'Valencia' orange, a C3 species. The results reported here indicate that 'Valencia' orange flower buds are capable of assimilating 14C02 into a number of compounds, including sugars, amino acids, and organic acids in their own tissues. The photosynthetic assimilation of these flower buds could be indicative of possible significance for regulation during the early stages of fruit initiation and setting in Citrus.

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Growth and Development of Soybean (Glycine max [L.] Merr.) Pods

Cited by 76 publications

References 9 publications

Histology and histochemistry of pericarp of grain legumes: Cajanus cajan, Vigna mungo and Vigna radiata.

Histology and histochemistry of pericarp of grain legumes: Cajanus cajan, Vigna mungo and Vigna radiata.

Photosynthetic Pod Wall of Pea (Pisum sativum L.)

Photosynthetic Activity in the Flower Buds of `Valencia' Orange (Citrus sinensis [L.] Osbeck)

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