The Contribution of Photosynthesis to Chlorophyll Formation in Etiolated Mung Bean Leaves

Dodge, A. D.; Alexander, D. J.; Blackwood, G. C.

doi:10.1111/j.1399-3054.1971.tb01090.x

Cited by 11 publications

(3 citation statements)

References 23 publications

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“…Duysen et al (1980) found poor linkage between electron transport and photophosphoryiation during early greening, and others (DeGreef andVerbelen 1977, Hampp andWellburn 1980) have concluded that early greening is largely dependent on mitochondrial oxidative phosphorylation. Also in primary leaves of mung bean, Dodge et al, (1971) demonstrated that most of the greening is independent of cyclic photophosphoryiation. An hypothesis that tentoxin inhibits the hydrogen ion pump of acid to base phosphorylation also seems unlikely, because etiopiasts do not exhibit the phenomenon.…”

Section: Cytochrome/ Measurementsmentioning

confidence: 96%

“…The additional Chi formed in continuous light could be the partial result of high irradiance response-induced synthesis (a phytochrome-controUed phenomenon) rather than photosynthesis (Mohr 1977). Dodge et al (1971) demonstrated the necessity for photosynthesis in the greening of 7-day-old etiolated mung bean leaves only when the leaves were removed from their food reserves (the cotyledons). Thus, the greening of intact seedling ieaves, as in our experiments, was probably largely sustained by seedling food reserves during intermittentlight greening.…”

Section: Cu Accumulation In Interniiltent Lightmentioning

confidence: 99%

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Tentoxin does not cause chlorosis in greening mung bean leaves by inhibiting photophosphorylation

Duke

Wickliff

Vaughn

et al. 1982

Physiologia Plantarum

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Effects of the fungal toxin, tentotoxin, on development and chlorophyll accumulation of plastids of primary leaves of mung bean [Vigna radiata (L.) Wilczek cv. Berken] were studied using spectrophotometric, electrophoretic, and microscopic procedures. In etioplasts of control tissues both prolamellar bodies and prothylakoids occurred, whereas small vesicles were associated with structurally distinct prolamellar bodies in tentoxin‐affected etioplasts. As determined by in vivo spectrophotometry, tentoxin‐affected etioplasts had 25% less phototransformable protochlorophyll(ide) and 35% less non‐phototransformable protochlorophyll(ide) than had control etioplasts after 5 days of dark seedling growth. Tentoxin had no effect on the rate of the Shibita shift. Protochlorophyll(ide) resynthesis in the dark immediately after protochlorophyll(ide) phototransformation was five to six times slower in tentoxintreated than in control tissues. Effects on chlorophyll(ide) content were observed within 30 min of the beginning of continuous white light exposure. In vivo measurement of cytochrome f redox activity revealed that this cytochrome was linked to light‐driven electron flow in control tissues within 20 min of the beginning of continuous white light, whereas in the tentoxin‐treated tissues there was no linkage (despite the presence of cytochromef) at any time. Coupling factor 1 was present and had potential ATPase activity in both control and tentoxin‐affected plastids. There was about sixteen times more chlorophyll in control than in tentoxin‐treated tissues in continuous as well as in intermittent (2 min light/118 min dark) light. These data are consistent with the view that tentoxin disrupts normal etioplast and chloroplast development through a mechanism unrelated to photophosphorylation.

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Section: Cytochrome/ Measurementsmentioning

confidence: 96%

Section: Cu Accumulation In Interniiltent Lightmentioning

confidence: 99%

Tentoxin does not cause chlorosis in greening mung bean leaves by inhibiting photophosphorylation

Duke

Wickliff

Vaughn

et al. 1982

Physiologia Plantarum

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“…The characteristics of the other reaction(s), which require a higher fluence rate, are not clear at present. It is premature to decide whether it may be related to any photosynthetic reaction (Dodge et al 1971, Gough et al 1981, to light activation of any enzymes, or to something else. The reduction in the rate of Chi formation under high fluence rates (>100 fimol m"' s"') during both the lag and the steady-state phases (Fig.…”

Section: Discussionmentioning

confidence: 99%

Benzyladenine‐induced stimulation of two components of chlorophyII formation in etiolated cucumber cotyledons

Dei

1984

Physiologia Plantarum

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Excised etiolated cotyledons of cucumber (Cucumis sativus L. cv. Aonagajibai) were continuously irradiated under various intensities of white light. The rate of chlorophyII (Chi) formation during the lag phase reaches a plateau at fluence rates above 1.4 urmol m−2 s−1. This is true in both water‐control and benzyladenine (BA)‐pretreated cotyledons. In cotyledons pretreated for 14 h with BA in darkness (in which case, Chl formation is stimulated by BA during both the lag and the steady‐state phases), the increase in the steady‐state rate of Chl formation with increasing light in tensity is stimulated compared to that of the water control over the range of fluence rates, 0. 25‐43 urmol m−2 s−1. In cotyledons pretreated for 6 h with BA in darkness (only Chl formation during the lag phase is stimulated), only an increase in fluence rate from 0.25 to 1.4 umol m−2 s−1 causes a higher increase in the Chl formation in the BA‐treated cotyledons than in the water control. The time course of Chl formation shows that the BA‐induced late‐appearing effect (stimulation of the steady‐state rate) is almost absent at low intensity illumination, but the BA‐induced fast‐appearing effect (elimination of the lag phase) is effective at all intensities. From this evidence, the Chl‐forming process apparently consists of two components, whose periods of operation or light‐intensity requirements are different. BA stimulates the rates of the respective components in both the fast and the late‐appearing effects.

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Growth and Differentiation of Seedlings of an Aquatic Plant, Trapella sinensis OLIV II. Photosynthesis and Respiration of Seedling in Early Stages

Yabe

Okuda

Takada

1974

Intl Review of Hydrobiology

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Trapella s i~~e i~s i dseedlings were exanlined to determine whether the effect of growth regulators such as gibberellin (GA,), kinetin and the extract of C'hlorella cells on chlorophyll formation, photospthetic activity and cytochrome oxidase activity depend upon the developmental stage. Each addition promoted the growth on both the basis of dry weight and of fresh weight. Among these regulators, only Chlorella extract promoted growth as a result of an activated rate of photosynthesis through increased chlorophyll formation. There also was an increased respiratory rate through increased cytochrome oxidase activity.

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The Contribution of Photosynthesis to Chlorophyll Formation in Etiolated Mung Bean Leaves

Cited by 11 publications

References 23 publications

Tentoxin does not cause chlorosis in greening mung bean leaves by inhibiting photophosphorylation

Tentoxin does not cause chlorosis in greening mung bean leaves by inhibiting photophosphorylation

Benzyladenine‐induced stimulation of two components of chlorophyII formation in etiolated cucumber cotyledons

Growth and Differentiation of Seedlings of an Aquatic Plant, Trapella sinensis OLIV II. Photosynthesis and Respiration of Seedling in Early Stages

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