The metabolism of glycine and glycollate by pea leaves in relation to photosynthesis

Biochimica et Biophysica Acta (BBA) - Biophysics including Photosynthesis Pub Date : 1966-06-08 DOI:10.1016/0926-6585(66)90346-3

B.J. Miflin , A.F.H. Marker, C.P. Whittingham

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引用次数: 39

Abstract

1.
1. The metabolism of ¹⁴C-labelled glycollate and glycine both to sucrose and to a polyglucan via serine has been demonstrated in excised pea leaves. The effect of light, DCMU, isonicotinyl hydrazide and the partial pressure of CO₂ on the pathway has been studied.
2.
2. The metabolism of [¹⁴C]glycine and serine formed during a preceding period of photosynthesis has been followed during a subsequent period of photosynthesis in ¹²CO₂. The radioactivity in the glycine and serine declined whilst that in sucrose rose, suggesting that in photosynthesis some sucrose is formed via glycine and serine. The effect of changes in partial pressure of carbon dioxide indicates that the photosynthetic pathway may be spatially separated from that which metabolises exogenous glycine and glycollate.

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豌豆叶片对甘氨酸和甘氨酸的代谢与光合作用的关系

1.1. 在切除的豌豆叶片中，14c标记的甘氨酸和甘氨酸通过丝氨酸代谢为蔗糖和聚葡聚糖。研究了光、DCMU、异烟碱酰肼和CO2分压对反应途径的影响。[14C]甘氨酸和丝氨酸在前一阶段光合作用中形成的代谢在随后的12CO2光合作用中被遵循。甘氨酸和丝氨酸的放射性下降，而蔗糖的放射性上升，说明在光合作用中，一些蔗糖是通过甘氨酸和丝氨酸形成的。二氧化碳分压变化的影响表明，光合途径可能与代谢外源甘氨酸和甘酸盐的途径在空间上分离。

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Biochimica et Biophysica Acta (BBA) - Biophysics including Photosynthesis

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