Iron Transport in Pea Plants

Branton, Daniel; Jacobson, Louis

doi:10.1104/pp.37.4.539

Cited by 41 publications

(19 citation statements)

References 31 publications

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“…The radioautographs also confirm the hypothesis that roots placed in 0.5 ppm Fe as FeCl3 are rapidly covere(l with iron particles (5). Figure ld shows that roots grown in the absence of iron were corpletely coated with Fe59 after only 4 minutes in Fe59 Cl3.…”

Section: Discussionsupporting

confidence: 69%

“…A previous paper (5) presented evidence that iron transfer across the root to the stele is an active, metabolic process. It was also concluded that sufficient amounts of iron must accumulate in the root parenchyma before release to the xylem occurs.…”

Section: Discussionmentioning

confidence: 99%

“…grown in aerated, purified Hoagland solutions as has been detailed elsewhere (5). For an experiment, the plants were transferred to aerated experimental solutions containing Fe55 or Fe59.…”

mentioning

confidence: 99%

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Iron Localization in Pea Plants

Branton

Jacobson

1962

Plant Physiol.

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Section: Discussionsupporting

confidence: 69%

Section: Discussionmentioning

confidence: 99%

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Iron Localization in Pea Plants

Branton

Jacobson

1962

Plant Physiol.

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“…However, very little information relating to the action of growth substances on the absorption and transport of Fe is available in the literature (1,12,20). The present paper deals with the effects of 6-furfurylaminopurine, gibberellic acid, 2-chloroethyltrimethylammonium chloride, N,N-dimethylaminosuccinamic acid, 4-hydroxy-5-isopropyl-2-methylphenyl trimethylammonium chloride 1-piperi- (2,14). The plants with intact roots and decorticated roots were mounted on waxed filter paper discs (15) and kept in a beaker containing 200 ml of 59Fe-labeled GROWTIH SUBSTANCES AND IRON UPTAKE FeSO4 under light for 3 hr.…”

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confidence: 99%

Effects of Growth Substances on the Absorption and Transport of Iron Plants

Kannan

Mathew

1970

Plant Physiol.

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The effects of a number of growth substances on the absorption and translocation of iron were studied in bean plants. Gibberellic It has been shown that Fe absorption by roots and leaves is metabolic (11,20). Growth substances are known to increase, retard, or modify plant growth by affecting diverse metabolic processes (18,19), and it is likely that these substances also affect the mechanism of ion uptake (17). However, very little information relating to the action of growth substances on the absorption and transport of Fe is available in the literature (1,12,20). The present paper deals with the effects of 6-furfurylaminopurine, gibberellic acid, 2-chloroethyltrimethylammonium chloride, N,N-dimethylaminosuccinamic acid, 4-hydroxy-5-isopropyl-2-methylphenyl trimethylammonium chloride 1-piperidine carboxylate (Amo 1618), and triiodobenzoic acid on Fe absorption by leaves and roots, and its transport to other organs.MATERIALS AND METHODS Plant Materials. Bean (Phaseolus vulgaris L.) seeds were surface sterilized with 1 % sodium hypochlorite and germinated in the dark, on a filter paper supported by a stainless steel screen which was kept in a tray containing aerated distilled water. After 3 days the seedlings were transferred to aerated halfstrength Hoagland nutrient solution and grown under a 12-hr photoperiod regime (500 ft-c) at 250. Maize (Zea mays L.) seeds were germinated in the dark on cheesecloth supported by a nylon screen over aerated distilled water containing 0.2 mM CaSO4, and after 3 days they were placed under a 12-hr photoperiod. The maize seedlings were grown in aerated 0.2 mm CaSO4 solution which was renewed once in 2 days. Seven-to 10-dayold plants were used in the experiments. All the experiments were carried out at room temperature (25 + 10).

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“…Iron has classically been considered a relatively immobile ion in plants and iron deficiencies have been attributed to this immobility (4). More recent work has showni that iron is at least moderately mobile in plants (2,3) and that a good degree of correlation exists between the chlorophyll content of leaves and their iron content (9). Foliar-applied iron has been shown to be redistributed from the leaf to which it was applied to yotung expanding leaves and to regions of meristematic activity (3,6).…”

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confidence: 99%

Absorption and Translocation of Foliar-Applied Iron

Eddings

Brown

1967

Plant Physiol.

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,Summary. The absorption of 59Fe3+ by the leaves of various plant species was studied. Stomata were fotund to play a major role in foliar absorption when leaves were totally submerged in treatment solutions, and a correlation was found to exist between stomatal area and absorption. Day treated leaves absorbed much more than did night treated leaves. The use of a surfactant markedly increased absorption. Translocation from treated leaves was demonstrated and was found to vary with species.The application of various materials to plant foliage has become an everyday occuirrence in modern agriculture. Many of these materials exert their desired effect by remaining on the exterior of the foliage, but at least 2 of them, namely growth regulators ( including herbicides) and nutrients, are effective only when they penetrate into the leaf itself. Leaf cuticle presents a major barrier to the penetration of these materials, but appears to be slowly permeable to both polar and apolar substances (5). In reviewing the conflicting literatuire on cuticuilar and stomatal uptake of foliar applied materials, Currier and Dybing (5) conclude that '. . . both stomata and cuticle may be involved, with the stomatal component varying widely duie to a complex of factors influencing stomatal opening." The major problem remaining unanswered is the relative importance of each path under specified conditions.It is well established in the literature that surfactants increase the effectiveness of herbicides.The effect of surfactants on nutrient uptake is not so clear, however. Some investigators report no effect oIn uiptake due to the presence of a suirfactant (1), some report a decrease (7), and others report an increase (7,8). In reviewing the literature, one arrives at the concltusion that factors not always well explained or considered in specific articles play a major role in whether or not surfactants increase, decrease, or have no effect on nutrient uptake. Such factors are A) method of application, B) nature of the nutrient being sttudied,

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Iron Transport in Pea Plants

Cited by 41 publications

References 31 publications

Iron Localization in Pea Plants

Iron Localization in Pea Plants

Effects of Growth Substances on the Absorption and Transport of Iron Plants

Absorption and Translocation of Foliar-Applied Iron

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