Investigations of the Role of Iron in Chlorophyll Metabolism I. Effect of Iron Deficiency on Chlorophyll and Heme Content and on the Activities of Certain Enzymes in Leaves

Marsh, H. V.; Evans, Harold J.; Matrone, Gennard

doi:10.1104/pp.38.6.632

Cited by 71 publications

(25 citation statements)

References 28 publications

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“…Cowpea plants (Vigna sinensis L.) were grown for 21 days on iron-sufficient (2.5 mg per liter) and iron-deficient (0.05 mg per liter) media as previously described (15). The effect of iron deficiency on chlorophyll formation in leaves was studied by incubating leaf discs with C14-labeled b-AL, succinate, citrate, and a-ketoglutarate.…”

Section: Methodsmentioning

confidence: 99%

“…Previous investigations (7,10,15) established that the concentrations of heme and chlorophyll in leaves are correlated with each other and with the level of iron in the nutrient medium. It was reported (15) that the activities of the enzymic systems involved in the synthesis of protoporphyrin from baminolevulinic acid (b-AL) were not reduced by iron deficiency, yet protoporphyrin failed to accumulate in iron-deficient leaves unless the tissue was incubated in the dark with b-AL.…”

Section: Introductionmentioning

confidence: 99%

“…It was reported (15) that the activities of the enzymic systems involved in the synthesis of protoporphyrin from baminolevulinic acid (b-AL) were not reduced by iron deficiency, yet protoporphyrin failed to accumulate in iron-deficient leaves unless the tissue was incubated in the dark with b-AL. Since protoporphyrin is a precursor of both chlorophyll and heme (12), these observations suggest that a depressed 3-Received for publication April 1, 1963.…”

Section: Introductionmentioning

confidence: 99%

“…Since significantly more protoporphyrin was identified in iron-chlorotic than in normiial cowpea leaves previously incubated in the dark with b-AL (15) …”

Section: Introductionmentioning

confidence: 99%

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Investigations of the Role of Iron in Chlorophyll Metabolism. II. Effect of Iron Deficiency on Chlorophyll Synthesis

1963

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…Since significantly more protoporphyrin was identified in iron-chlorotic than in normiial cowpea leaves previously incubated in the dark with b-AL (15) …”

Section: Introductionmentioning

confidence: 99%

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Investigations of the Role of Iron in Chlorophyll Metabolism. II. Effect of Iron Deficiency on Chlorophyll Synthesis

1963

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“…Nitrogen dan Mg merupakan unsur pembentuk struktur klorofil sementara Fe dibutuhkan se bagai kofaktor enzim yang penting untuk pembentukan klorofil. Defisiensi unsur Fe menyebabkan penurunan aktivitas enzim yang ber peran dalam konversi protoporphyrin menjadi klorofil (Marsh et al, 1963), sedangkan defisiensi Mg dan nitogen menyebabkan penurunan fungsi klorofil (Aronoff, 1950).…”

Section: Hasil Dan Pembahasanunclassified

THE PHYSIOLOGICAL RESPONSE AND PRODUCTIVITY OF MAIZE (Zea mays L.) ‘Sweet Boy-02’ IN DIFFERENT LIGHT AND WATER TREATMENT

Akmalia

Suharyanto

2017

teknosains

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Physiological response is one of adaptation in plant toward its environment. This is related to plant aBstraKRespon fisiologis merupakan salah satu adaptasi tanaman terhadap lingkungannya. Hal ini sangat terkait dengan produktivitas tanaman karena terjadi perubahan mekanisme fisiologis yang akan menjadi kunci fenotipe dan produktivitas yang dihasilkan. Tujuan penelitian ini yaitu (1) untuk mengetahui respon fisiologis tanaman jagung 'Sweet Boy-02' pada perbedaan intensitas cahaya dan penyiraman serta (2) menentukan intensitas cahaya dan penyiraman yang tepat guna peningkatan produktivitas jagung. Rancangan penelitian yang digunakan adalah Rancangan Acak Lengkap dengan 3 faktor intensitas cahaya (63694, 11408 dan 3897 Lux) dan 3 faktor penyiraman (pemberian air sebanyak 2 L; 1,6 L; 1,2 L). Tiap kombinasi perlakuan dibuat tiga ulangan. Penanaman jagung dilakukan di lahan Sawitsari, Yogyakarta. Jagung dipanen saat berumur 75 hari dengan respon fisiologis yang diamati adalah kadar klorofil, kadar prolin, dan panjang akar sedangkan produktivitas jagung diukur dari berat buah tanpa kelobot. Data dianalisis menggunakan Analisis Sidik Ragam Varian (Anava) dilanjutkan dengan uji Duncan's Multiple Range Test (DMRT) pada tingkat signifikansi 5%. Kadar klorofil dan produktivitas tanaman meningkat pada intensitas cahaya L1 (63694 Lux) dan penyiraman W1 (2 L), sedangkan kadar prolin dan panjang akar meningkat pada intensitas cahaya L1 (63694 Lux) dengan penyiraman W2 (1,6 L) dan W3 (1,2 L). Produktivitas jagung paling optimal terdapat pada kombinasi perlakuan L1 (63694 Lux) dengan penyiraman W1 (2 L) ditandai dengan berat tongkol paling besar.Kata Kunci: Adaptasi; Respon fisiologis; Produktivitas; Sweet Boy-02.

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Minimal medium for optimal growth and lipid production of the microalgae Scenedesmus dimorphus

Welter

Schwenk

Kanani

et al. 2013

Env Prog and Sustain Energy

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The culture of Scenedesmus dimorphus at the laboratory scale has often been in standard microalgae media, such as 3N‐Basal Bold medium (3N‐BB), which contains 15 different chemicals. Given the extremely tight profit margins of large‐scale production of biofuel from microalgae, it is important to identify the minimally sufficient quantities of nutrients necessary to maximize lipid productivity. The individual and interactive effects of six groupings of the components of 3N‐BB medium on growth rate, lipid content, and total biomass yield of S. dimorphus were determined. Trace metal and vitamin concentrations were reduced to 1/6 the level of 3N‐BB medium without adversely affecting growth rates and biomass concentration, while concentrations of CaCl2 and K2HPO4/KH2PO4 were reduced to 1/10 that of 3N‐BB without adversely affecting biomass and lipid concentrations. Both lipid productivity and lipid content were maximized at the lowest NaNO3 concentration (1/10 that in 3N‐BB) and independent of MgSO4 concentration, while the interaction of these two chemicals enhanced biomass concentration. © 2013 American Institute of Chemical Engineers Environ Prog, 32: 937–945, 2013

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Investigations of the Role of Iron in Chlorophyll Metabolism I. Effect of Iron Deficiency on Chlorophyll and Heme Content and on the Activities of Certain Enzymes in Leaves

Cited by 71 publications

References 28 publications

Investigations of the Role of Iron in Chlorophyll Metabolism. II. Effect of Iron Deficiency on Chlorophyll Synthesis

Investigations of the Role of Iron in Chlorophyll Metabolism. II. Effect of Iron Deficiency on Chlorophyll Synthesis

THE PHYSIOLOGICAL RESPONSE AND PRODUCTIVITY OF MAIZE (Zea mays L.) ‘Sweet Boy-02’ IN DIFFERENT LIGHT AND WATER TREATMENT

Minimal medium for optimal growth and lipid production of the microalgae Scenedesmus dimorphus

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