THE DEVELOPMENT OF CHLOROPLASTS IN ROOT MERISTEMATIC TISSUE OF <i>SECALE CEREALE</i> L. SEEDLINGS

Oliveira, Luis

doi:10.1111/j.1469-8137.1982.tb03311.x

Cited by 22 publications

(11 citation statements)

References 29 publications

(53 reference statements)

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“…Plant roots typically contain proplastids, some of which can be changed into chloroplasts after exposure to light (Oliveira 1982). S3 protein is involved in the synthesis of small ribosomal subunit (30S) and in the repair of DNA damage (Kim et al 2005).…”

Section: Discussionmentioning

confidence: 99%

Changes in the root proteome of Triticosecale grains germinating under osmotic stress

2013

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Osmotic stress causes many adverse symptoms in plants, which include, for example, growth limitation and decrease or even absence of yield. Proteomic analyses of plant responses to stressors could lead to the introduction of crops with high resistance to osmotic stress. Such plants would be characterized by high yield even under unfavorable environmental conditions. In this article we describe changes in the protein profiles occurring in response to mild and moderate osmotic stress in triticale roots. Analysis of the protein profiles of these roots showed an increased abundance of 14 and a decreased abundance of 11 proteins under mild osmotic stress conditions while a moderate osmotic stress caused an increased abundance of 18 and a decreased abundance of 33 proteins. Twenty-five proteins, whose quantity altered under stress were identified using MALDI-TOF mass spectrometry. The identified proteins were classified into the categories of proteins associated with: defense mechanisms, metabolism, transcription, cell structure, protein synthesis, transport and signal transduction. The functions of identified proteins were discussed in relation to osmotic stress. Some of the identified proteins may be responsible for the adaptation of plants to adverse conditions.

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Section: Discussionmentioning

confidence: 99%

Changes in the root proteome of Triticosecale grains germinating under osmotic stress

2013

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“…we cotild estimate this amotint to be some thousand times less than in etiolated leaves. The plastids present in roots are very small, indicating a low degree of plastid development (Oliveira 1982). This could perhaps also provide an explanation to the difference in relative amounts of Pchlide and Pchls between roots and etiolated leaves.…”

Section: Discussioiimentioning

confidence: 99%

Characterization of protochlorophyllide and protochlorophyllide esters in roots of dark‐grown plants

McEwen

Lindsten

1992

Physiologia Plantarum

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The protochlorophyll pools of roots of dark‐grown wheat (Triticum aestivum L. cv. Walde), maize (Zea mays L. cv. Goldcrest) and wrinkledseeded pea (Pisum sativum L. ssp. sativurh cv. Kelvedon Wonder) were investigated by high performance liquid chromatography (HPLC) and low temperature fluorescence spectroscopy. All roots contained protochlorophyllide and esterified protochlorophyllides (protochlorophylls) but with considerably larger relative amounts of the latter compared with etiolated leaves. The alcohol moieties of the 4 detected protochlorophylls were geranylgeraniol (GG), dihydrogeranylgeraniol (DHGG), tetrahydrogeranylgeraniol (THGG) and phytol. The relative amounts of the different protochlorophylls varied between the species. Protochlorophyllide and the 4 protochlorophylls all contained monovinyl forms. The divinyl forms could not be detected by our instruments. Wrinkledseeded pea contained in addition chlorophyll a, some unidentified chlorophylls and negligible amounts of chlorophyllide. Small amounts of carotenoids were found in roots of all investigated species. The carotenoids were the same as those found in green or etiolated leaves, but present in different relative amounts.

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“…Little is known about the ultrastructure or the function of plastids in roots. Most ultrastructural investigations have been confined to the root tip (Newcomb, 1967) or have been concerned either with the starch-containing statoliths in root caps and their role in geoperception (GrifiSths and Audus, 1964;Juniper and French, 1970;Barlow and Grundwag, 1974), or with the conversion of root proplastids into chloroplasts during greening (Heltne and Bonnett, 1970;Salema, 1971;Oliveira, 1982) a process which has been shown in excised roots, to have different light requirements from those in leaves (summarized in Bjorn, 1980). It has long been known that in most roots cellular differentiation follows a bidirectional course, the first sequence extending from the apical meristem upwards through the root p-roper and the second downwards through the root cap (Esau, 1965).…”

Section: Introductionmentioning

confidence: 99%

PLASTIDS IN THE ROOTS OF PHASEOLUSVULGARIS

Whatley¹

1983

New Phytologist

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SUMMARYIn roots of Phaseolus vulgaris plastid development takes place from the apical meristem both upwards into the root proper and downwards into the root cap. The maximum state of plastid development seems to be achieved in the cortical cells of that part of the primary root associated with mature root hairs. However in these cortical cell plastids the thylakoid system is very limited in extent and no true prolamellar bodies are formed. Farther from the apex of the root proper, in the zone of mature lateral roots, the plastids appear to have undergone dedifferentiation and to have lost whatever thylakoids they once contained.Both the rate of plastid development and the patterns of production of ancillary plastid structures, including starch and membrane-bound bodies, vary in different cell files. The differential distribution of these and other plastid features are summarized in the accompanying diagrams.

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THE DEVELOPMENT OF CHLOROPLASTS IN ROOT MERISTEMATIC TISSUE OF SECALE CEREALE L. SEEDLINGS

Cited by 22 publications

References 29 publications

Changes in the root proteome of Triticosecale grains germinating under osmotic stress

Changes in the root proteome of Triticosecale grains germinating under osmotic stress

Characterization of protochlorophyllide and protochlorophyllide esters in roots of dark‐grown plants

PLASTIDS IN THE ROOTS OF PHASEOLUSVULGARIS

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