Applications of mineral nutrients to heavily N-fertilized Scots pine trees: Effects on arginine and mineral nutrient concentrations

1996 ◽  
Vol 184 (1) ◽  
pp. 57-65 ◽  
Author(s):  
Ann-Britt Edfast ◽  
Torgny N�sholm ◽  
Aron Aronsson ◽  
Anders Ericsson
Keyword(s):  
Scots Pine ◽  
Mineral Nutrients ◽  
Mineral Nutrient ◽  
Nutrient Concentrations ◽  
Pine Trees

scholarly journals Physiological and Nutritional Responses of ‘HB’ Pummelo [Citrus grandis (L.) Osbeck ‘Hirado Buntan’] to the Combined Effects of Low pH Levels and Boron Deficiency

HortScience ◽  
2020 ◽  
Vol 55 (4) ◽  
pp. 449-456
Author(s):  
Gaofeng Zhou ◽  
Bixian Li ◽  
Jianmei Chen ◽  
Fengxian Yao ◽  
Guan Guan ◽  
...  
Keyword(s):  
Gas Exchange ◽  
Southern China ◽  
Leaf Gas Exchange ◽  
Mineral Nutrients ◽  
Low Ph ◽  
Stress Factors ◽  
Mineral Nutrient ◽  
Nutrient Concentrations ◽  
Boron Deficiency ◽  
Combined Effects

Soil acidification and boron (B) starvation are two dominant abiotic stress factors impacting citrus production in the red soil region of southern China. To evaluate the combined effects of low pH and B deficiency on plant growth, gas exchange parameters, and the concentrations of B and other mineral nutrients, ‘HB’ pummelo seedlings were treated under B deficiency (0 μM H3BO3) or adequate B (23 μM H3BO3) conditions at various low pH levels (4.0, 5.0, and 6.0). The seedlings were grown with modified half-strength Hoagland’s solution under greenhouse conditions for 12 weeks. Plant biomass, leaf area, seedling height, and root traits were remarkably inhibited by low pH and B deficiency stresses, and these parameters were extremely reduced with the decrease in pH levels. After 12 weeks of treatment, typical stress symptoms associated with B deficiency in citrus leaf were observed, with more severe symptoms observed at pH 4.0 and 5.0 than at pH 6.0. Leaf gas exchange parameter measurements showed that leaf photosynthesis was significantly inhibited under both low pH and B-deficient conditions. Notably, the lower the pH level, the greater the inhibition under both normal and deficient B conditions. Further investigations of the mineral nutrient concentrations showed that under both low pH and B deficiency, the concentrations of B and other mineral nutrients were influenced remarkably, particularly at pH 4.0 and 5.0. The physiological and nutritional results of the ‘HB’ pummelo seedlings indicated that low pH can exacerbate the effects of B deficiency to a certain extent.

Mineral Nutrient Composition of Leaves and Fruits of Selected Species of Grevillea From Southwestern Australia, With Special Reference to Grevillea leucopteris Meissn

1986 ◽  
Vol 34 (2) ◽  
pp. 155 ◽  
Author(s):  
PJ Hocking
Keyword(s):  
Genetic Regulation ◽  
Distribution Patterns ◽  
Mineral Nutrients ◽  
Mineral Nutrient ◽  
Nutrient Concentrations ◽  
Southwestern Australia ◽  
P Content ◽  
Low Levels ◽  
High Concentrations ◽  
Very High

A study was made of mineral nutrient concentrations and distributions in leaves and fruits of 10 species of Grevillea from diverse localities in south-western Australia. Seeds of all species contained high concentrations of mineral nutrients, despite the nutrient-poor soils of their habitats. Leaves and the leathery follicles which contained the seeds typically had very low levels of nutrients. With few exceptions, the concentration and distribution patterns of a particular nutrient in fruits were similar in all the species studied. In these species, over 90% of the P content, and between 50 and 70% of the N, Zn and Cu contents of a fruit were located in seeds. Some species accumulated very high concentrations of a particular nutrient, e.g. Ca in seeds and leaves of G. leucopteris, K in seeds of G. tripartita and Fe in follicles of G. petrophiloides. Ratios of K : Ca concentrations were low (< 1) in seeds of G. candelabroides, G. petrophiloides, G. pinaster and especially G. polybotrya and G. leucopteris, which are characterized by high Ca concentrations in their seeds. In the Grevillea species studied, Na C1 and Fe accumulated in the leathery follicle but not in the seeds. A study of G. leucopteris from 18 localities throughout its ecological and distributional range showed that concentrations and distribution patterns for each nutrient in fruits were similar, irrespective of soil type. It is concluded from the results for G. leucopteris and the other species that there is conservative genetic regulation of seed mineral nutrition in the genus Grevillea.

scholarly journals Fertilization and Pre-Sowing Seed Soaking Affect Yield and Mineral Nutrients of Ten Microgreen Species

Horticulturae ◽  
2021 ◽  
Vol 7 (2) ◽  
pp. 14
Author(s):  
Tongyin Li ◽  
Geoffrey T. Lalk ◽  
Guihong Bi
Keyword(s):  
Cultural Practices ◽  
Mineral Nutrients ◽  
General Purpose ◽  
Mineral Nutrient ◽  
Nutrient Concentrations ◽  
Shoot Height ◽  
Visual Rating ◽  
Seed Soaking ◽  
Shoot Weight ◽  
Sowing Seed

Microgreens, vegetable or herb seedlings consumed at a young growth stage, are considered to be a functional food with high concentrations of mineral nutrients and healthy beneficial bioactive compounds. The production of microgreens has been increasing in recent years. Vegetable growers are interested in growing microgreens as a new specialty crop due to their high market value, popularity, and short production cycles. However, there is a lack of research-based crop-specific recommendations for cultural practices including fertilization, pre-sowing seed treatments, and their effects on nutritional facts of microgreens. Ten microgreen species were evaluated for their shoot growth and mineral nutrient concentrations as affected by one-time post-emergence fertilization and pre-sowing seed soaking in two repeated experiments, from November 2018 to January 2019, in a greenhouse. The microgreen species varied in fresh and dry shoot weights, shoot height, visual rating, as well as macro- and micro-nutrient concentrations. Fertilization with a general-purpose soluble fertilizer (20-20-20 with micronutrients) at a rate of 100 mg·L−1 nitrogen (N) increased fresh shoot weight, and macro- and micro-nutrient concentrations in one or both experiments, with the exception of decreasing concentrations of calcium (Ca), magnesium (Mg), and manganese (Mn). Seed soaking consistently decreased fresh or dry shoot weight and nutrient concentrations when there was a significant effect.

scholarly journals Applications of Abscisic Acid and Increasing Concentrations of Calcium Affect the Partitioning of Mineral Nutrients between Tomato Leaf and Fruit Tissue

Horticulturae ◽  
2019 ◽  
Vol 5 (3) ◽  
pp. 49
Author(s):  
Barickman ◽  
Kopsell ◽  
Sams
Keyword(s):  
Abscisic Acid ◽  
Nutrient Concentration ◽  
Mineral Nutrients ◽  
Tomato Leaf ◽  
Mineral Nutrient ◽  
Nutrient Concentrations ◽  
Water Control ◽  
Tomato Plants ◽  
Fruit Tissue ◽  
Exogenous Aba

This study examined how abscisic acid (ABA) and calcium (Ca) concentrations in nutrient solution affect concentrations of mineral nutrients in tomato leaves and fruit. Tomato plants were grown in a greenhouse at 25/20 C (day/night) under a 16 h photoperiod. Plants were treated with different concentrations of ABA and Ca. Calcium was applied via the irrigation lines at 60, 90, or 180 mgL−1. ABA was applied as a combination of foliar sprays and root applications. For foliar ABA applications, treatments consisted of deionized (DI) water control (0.0 mg·L−1 ABA) or 500 mg·L−1 ABA. For ABA root applications, treatments consisted of no ABA control (0.0 mg·L−1 ABA) or 50 mg·L−1 ABA applied via the irrigation lines. Results indicate that mineral nutrient concentrations in tomato leaf and fruit tissue varied in connection with each exogenous application of ABA. Variability in mineral nutrient concentration depended on if ABA was applied to the leaf or root tissue. Additionally, increasing Ca treatment concentrations either decreased or did not change mineral nutrients in tomato and fruit tissue. Thus, tomato plants react to acquiring mineral nutrients in numerous mechanisms and, depending on how the applications of exogenous ABA are applied, can have varying effects on these mechanisms.

scholarly journals Shoot Production and Mineral Nutrients of Five Microgreens as Affected by Hydroponic Substrate Type and Post-Emergent Fertilization

Horticulturae ◽  
2021 ◽  
Vol 7 (6) ◽  
pp. 129
Author(s):  
Tongyin Li ◽  
Geoffrey T. Lalk ◽  
Jacob D. Arthur ◽  
Madeline H. Johnson ◽  
Guihong Bi
Keyword(s):  
Cultural Practices ◽  
Mineral Nutrients ◽  
Mineral Nutrient ◽  
Nutrient Concentrations ◽  
Shoot Height ◽  
Specialty Crop ◽  
N Concentration ◽  
Substrate Choice ◽  
High Concentrations ◽  
K Concentration

As a new specialty crop with high market value, microgreens are vegetable or herb seedlings consumed at a young age, 7–21 days after germination. They are known as functional food with high concentrations of mineral nutrients and health beneficial phytochemicals. Microgreen industry lacks standardized recommendations on cultural practices including species/variety selection, substrate choice, and fertilization management. This study evaluated shoot growth and mineral nutrient concentrations in five microgreens including four Brassica and one Raphanus microgreens as affected by four hydroponic pad types and post-emergent fertilization in two experiments in January and February 2020. The five microgreens varied in their shoot height, fresh, dry shoot weights, and mineral nutrient concentrations with radish producing the highest fresh and dry shoot weights. Radish had the highest nitrogen (N) concentration and mustard had the highest phosphorus (P) concentrations when grown with three hydroponic pads except for hemp mat. Hydroponic pad type altered fresh, dry shoot weights, and mineral nutrients in tested microgreens. Microgreens in hemp mat showed the highest shoot height, fresh, dry shoot weights, and potassium (K) concentration, but the lowest N concentration in one or two experiments. One time post-emergent fertilization generally increased shoot height, fresh, dry shoot weights, and macronutrient concentrations in microgreens.

scholarly journals Interacting effects of insect and ungulate herbivory on Scots pine growth

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Michelle Nordkvist ◽  
Maartje J. Klapwijk ◽  
La rs Edenius ◽  
Christer Björkman
Keyword(s):  
Plant Growth ◽  
Scots Pine ◽  
Growth Response ◽  
Insect Herbivory ◽  
Additive Effects ◽  
Significant Interaction Effect ◽  
Ungulate Herbivory ◽  
Pine Trees ◽  
Multiple Species ◽  
Species Specific

AbstractMost plants are subjected to damage from multiple species of herbivores, and the combined impact on plant growth can be non-additive. Since plant response to herbivores tends to be species specific, and change with repeated damage, the outcome likely depend on the sequence and number of attacks. There is a high likelihood of non-additive effects on plant growth by damage from mammals and insects, as mammalian herbivory can alter insect herbivore damage levels, yet few studies have explored this. We report the growth response of young Scots pine trees to sequential mammal and insect herbivory, varying the sequence and number of damage events, using an ungulate-pine-sawfly system. Combined sawfly and ungulate herbivory had both additive and non-additive effects on pine growth—the growth response depended on the combination of ungulate browsing and sawfly defoliation (significant interaction effect). Repeated sawfly herbivory reduced growth (compared to single defoliation) on un-browsed trees. However, on browsed trees, depending on when sawfly defoliation was combined with browsing, trees exposed to repeated sawfly herbivory had both higher, lower and the same growth as trees exposed to a single defoliation event. We conclude that the sequence of attacks by multiple herbivores determine plant growth response.

Freeze-preservation of buds from Scots pine trees

1991 ◽  
Vol 27 (1) ◽  
pp. 89-93 ◽  
Author(s):  
Tero Kuoksa ◽  
Anja Hohtola
Keyword(s):  
Scots Pine ◽  
Pine Trees

scholarly journals Scots pine (Pinus sylvestris) dynamics in the Welsh Marches during the mid to late-Holocene

The Holocene ◽  
2021 ◽  
pp. 095968362199465
Author(s):  
Dael Sassoon ◽  
William J Fletcher ◽  
Alastair Hotchkiss ◽  
Fern Owen ◽  
Liting Feng
Keyword(s):  
Pinus Sylvestris ◽  
Scots Pine ◽  
Late Holocene ◽  
British Isles ◽  
Loss On Ignition ◽  
Peat Core ◽  
New Information ◽  
Pine Trees ◽  
Pollen Records

Around 4000 cal yr BP, Scots pine ( Pinus sylvestris) suffered a widespread demise across the British Isles. This paper presents new information about P. sylvestris populations found in the Welsh Marches (western central Britain), for which the long-term history and origins are poorly known. Two new pollen records were produced from the Lin Can Moss ombrotrophic bog (LM18) and the Breidden Hill pond (BH18). The LM18 peat core is supported by loss-on-ignition, humification analysis and radiocarbon dating. Lead concentrations were used to provide an estimated timeframe for the recent BH18 record. In contrast to many other Holocene pollen records from the British Isles, analysis of LM18 reveals that Scots pine grains were deposited continuously between c. 6900–300 cal yr BP, at frequencies of 0.3–5.4%. It is possible that individual Scots pine trees persisted through the wider demise on thin soils of steep drought-prone crags of hills or the fringes of lowland bogs in the Welsh Marches. At BH18, the record indicates a transition from broadleaved to mixed woodland, including conifer species introduced around AD 1850 including Picea and Pinus. The insights from BH18 suggest that the current populations may largely be the result of planting. Comparison of the LM18 findings with other regional pollen records highlights consistent patterns, including a Mid-Holocene maximum (ca. 7000 cal yr BP), long-term persistence at low pollen percentages and a Late-Holocene minimum (ca. 3000 cal yr BP). These distinctive trends encourage further studies on refugial areas for Scots pine in this region and elsewhere.

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