Plant Nutrients

Mengel, K.; Kirkby, Ernest A.; Kosegarten, Harald; Appel, Thomas

doi:10.1007/978-94-010-1009-2_1

Cited by 231 publications

(320 citation statements)

References 3 publications

Supporting

Mentioning

278

Contrasting

Unclassified

Order By: Relevance

“…Sulphates are the main uptake form of sulphur for the plants, for which the necessity of active uptake is assumed for get- , requires their reduction (Mengel and Kirkby 1982). Sulphur is a building element of the essential amino acids (methionine, cysteine), which are essential parts of quality (full scope) proteins.…”

Section: Glucosinolates As Sulphur Supplymentioning

confidence: 99%

The role and effects of glucosinolates of Brassica species - a review

Zukalova¹,

Vasak²

2002

Plant Soil Environ.

View full text Add to dashboard Cite

Glucosinolates are the substituted esters of thio amino acids and their synthesis is based on the corresponding amino acids. Methionine and cysteine are the natural donors in the case of the Brassica plants and L-tryptophane in the indole glucosinolates, respectively. In Brassica genus, alkenyl glucosinolates are mostly present and their content and composition differ as far as the development stage and the part of the plant are concerned. The indole glucosinolates are present in a minority level. Their role of sulphur supply is questioned by their very low content between 2% in the beginning of vegetation and 0.1% in its end. Glucosinolates are discussed mostly from the aspect of their anti-nutrition, anti-microbial, anti-fungicidal, and anti-bacterial effects and as being natural bio-fumigants. Their decomposition products have the mentioned properties. The products originate by prepared passive protection by the two-component system. From the aspect of these properties, it is useful to divide them into the following three groups according to the characters of their decomposition products. The first group (I.), whose hydrolysis in the neutral and alkaline environment creates iso-thiocyanates. These bioactive compounds form the natural protection of the plant with bio-fumigatory effects particularly. Their anti-nutritive effects can be compensated by iodine, contrary to the second group (II.). This group is created by hydroxy-glucosinolates, whose decomposition products -iso-thio-cyanates -are not stable and they cycle while producing substituted 2-oxazolidinethione (goitrine -VTO). These glucosinolates represent a serious problem in feed industry since the VTO has a strong goitrogenic property. The third group (III.) -glucosinolates containing the indole group or the benzene ring (Sinalbin), create thio-cyanates during their hydrolysis. The role of indole glucosinolates has not been completely clarified so far. Their anti-carcinogenic effects are studied and they fulfil the role of an active protection.

show abstract

Section: Glucosinolates As Sulphur Supplymentioning

confidence: 99%

The role and effects of glucosinolates of Brassica species - a review

Zukalova¹,

Vasak²

2002

Plant Soil Environ.

View full text Add to dashboard Cite

show abstract

“…Potassium is both an osmoticum and an enzyme cofactor (Mengel & Kirkby, 2001). Acidity in wine reflects the balance between K, malic acid and tartaric acid (Deloire, 2010).…”

Section: Introductionmentioning

confidence: 99%

Effects of Weathered Soil Parent Materials on Merlot Grapevines Grafted onto 110 Richter and 101-14Mgt Rootstocks

Wooldridge¹,

Olivier²

2016

SAJEV

View full text Add to dashboard Cite

In a trial under semi-controlled conditions, Merlot grapevines on 101-14Mgt and 110 Richter (110R) rootstocks were grown in virgin soils developed in highly weathered parent materials derived mainly from granite and metasediment (shale). Each soil was irrigated at c. -0.075 MPa. The clay fractions of both soils were dominated by kaolinite. Lime and P were supplied, but no K. Bray II soil K levels from both parent materials were similar in the field state, but lower in the shale than in the granite when averaged over the trial period. Petiole K concentrations did not differ between rootstocks on the granite, but on the shale soils were higher in the vines on 101-14Mgt than on 110R. The granite x 101-14Mgt treatment significantly promoted (p ≤ 0.05) greater trunk circumferences, cane mass, leaf areas and overall wine quality than the shale x 110R treatment. Yields from grapevines in the granite x 110R and granite x 101-14Mgt treatments did not differ significantly. However, the granite x 101-14Mgt treatment produced higher yields than the shale x 101-14Mgt and shale x 110R treatments. These differences were attributed to an interaction between the soil and rootstock, with K availability and uptake as contributory factors.

show abstract

“…This reduction would have repercussions on organ growth and would impact on the antioxidant response of the roots to salt, particularly since transition metals (e.g. Cu and Fe) catalyze the formation of OH radicals from O − 2 in non-enzymatic Fenton reactions (Mengel & Kirkby 2001). Fe, Mn, Cu and Zn are also metals which bring about optimum conformation and activation of antioxidant enzymes, such SOD, and enable electron transport through changes to their valency (Mengel & Kirkby 2001).…”

Section: Discussionmentioning

confidence: 99%

“…Cu and Fe) catalyze the formation of OH radicals from O − 2 in non-enzymatic Fenton reactions (Mengel & Kirkby 2001). Fe, Mn, Cu and Zn are also metals which bring about optimum conformation and activation of antioxidant enzymes, such SOD, and enable electron transport through changes to their valency (Mengel & Kirkby 2001). NaCl treatment (100 mM) induced oxidative stress in leaves of the salt-sensitive line TNC 11.9, but leaves of the salt-tolerant line were not affected.…”

Section: Discussionmentioning

confidence: 99%

Phenolic content and antioxidant activity in two contrasting Medicago ciliaris lines cultivated under salt stress

et al. 2011

View full text Add to dashboard Cite

The objective of this study was to determine more indepth physiological and antioxidant responses in two Medicago ciliaris lines (a salt-tolerant line TNC 1.8 and a salt-sensitive line TNC 11.9) with contrasting responses to 100 mM NaCl. Under salt stress, both lines showed a decrease in total biomass and in the growth rate for roots, but TNC 1.8 was less affected by salt than TNC 11.9 in that it maintained leaf growth even in the presence of added salt. In both lines, salt stress mainly affected micronutrient status (Fe, Mn, Cu and Zn) rather than K nutrition, but the tolerant line TNC 1.8 accumulated more Na in leaves and less in roots compared with TNC 11.9. Salt stress decreased total soluble sugars (TSS) in all organs of the sensitive line TNC 11.9, whereas TSS was only reduced in roots of the tolerant line. The salt-induced drop in growth was linked to an increase in lipid peroxidation in roots of both lines and in leaves of the sensitive line. The salt-tolerant line TNC 1.8 was more efficient at managing salt-induced oxidative damage in leaves and to a lesser extent in roots than the salt-sensitive line TNC 11.9, by preserving higher phenolic compound and superoxide dismutase levels in both organs.

show abstract

Plant Nutrients

Cited by 231 publications

References 3 publications

The role and effects of glucosinolates of Brassica species - a review

The role and effects of glucosinolates of Brassica species - a review

Effects of Weathered Soil Parent Materials on Merlot Grapevines Grafted onto 110 Richter and 101-14Mgt Rootstocks

Phenolic content and antioxidant activity in two contrasting Medicago ciliaris lines cultivated under salt stress

Contact Info

Product

Resources

About