Boron and water uptake in jack pine (Pinus banksiana) seedlings

Apostol, Kent G.; Zwiazek, Janusz J.

doi:10.1016/j.envexpbot.2003.09.002

Cited by 26 publications

(17 citation statements)

References 28 publications

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“…Unlike in the earlier studies (Apostol et al 2002;Apostol and Zwiazek 2004), 2 mM B treatment produced very little needle necrosis and we observed no significant effects of B on transpiration rates in non-inoculated plants. However, B significantly reduced needle chlorophyll concentrations in non-inoculated plants.…”

Section: Discussioncontrasting

confidence: 85%

“…However, B significantly reduced needle chlorophyll concentrations in non-inoculated plants. The observed differences in the responses of plants to B treatment between the present and earlier (Apostol et al 2002;Apostol and Zwiazek 2004) studies may be due to lower B tissue concentrations that were present in shoots and roots of plants in the present study. Boron and NaCl have been suggested to have a cumulative effect on plants (Apostol et al 2002).…”

Section: Discussioncontrasting

confidence: 66%

“…Plants transport B with the transpiration stream to the leaves where chlorotic and necrotic lesions often appear at the tips and margins (Brown and Shelp 1997;Apostol and Zwiazek 2004). Boron may aggravate salt injury and enhance Na concentration in the shoots (Apostol et al 2002).…”

Section: Introductionmentioning

confidence: 98%

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Responses of mycorrhizal jack pine (Pinus banksiana) seedlings to NaCl and boron

Calvo-Polanco

Zwiazek

Jones

et al. 2008

Trees

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In earlier studies, we established that mycorrhizal associations protect plants against salt stress. However, elevated boron levels are often present in saline soils and little is known about the effects of boron on salt resistance of mycorrhizal plants. In the present study, we inoculated jack pine (Pinus banksiana) seedlings with Hebeloma sp., Suillus tomentosus and Wilcoxina mikolae var. mikolae to study the effects of mycorrhizal associations on seedling responses to boron and salt. Seedlings were grown in the greenhouse and subjected to 60 mM NaCl, 2 mM H 3 BO 3 or 60 mM NaCl + 2 mM H 3 BO 3 treatments for 4 weeks. Dry weights, shoot:root ratios and chlorophyll concentrations were higher in inoculated seedlings for all treatments compared with the noninoculated plants. When applied with NaCl, B aggravated needle necrosis while reducing Cl concentrations in shoots of non-inoculated plants. Plants treated with 2 mM H 3 BO 3 + 60 mM NaCl had similar concentrations of Na and B to those that were treated separately with 60 mM NaCl and 2 mM H 3 BO 3 . Plants inoculated with mycorrhizal fungi had lower shoot Na concentrations compared with non-inoculated seedlings, but showed relatively little impact from elevated B concentrations.

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Section: Discussioncontrasting

confidence: 85%

Section: Discussioncontrasting

confidence: 66%

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Responses of mycorrhizal jack pine (Pinus banksiana) seedlings to NaCl and boron

Calvo-Polanco

Zwiazek

Jones

et al. 2008

Trees

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“…Although B-deficient plants are more conservative in relation to water loss following elevated stomatal limitation, their water potential is lower than in B-sufficient plants, irrespective of the watering regime, because of lower water uptake (Hajiboland and Bastani 2012). Boron deficiency reduces root hydraulic conductivity (Apostol and Zwiazek 2004), likely due to disturbance in the formation of functional xylem vessels (Broadley et al 2012). A decline in root hydraulic conductance may also be caused by a reduction in new root growth in B-deficient plants.…”

Section: Boronmentioning

confidence: 99%

Environmental and nutritional requirements for tea cultivation

Hajiboland

2017

Folia Horticulturae

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Tea (Camellia sinensis) is an important beverage crop cultivated in the tropics and subtropics under acid soil conditions. Increased awareness of the health-promoting properties of the tea beverage has led to an increase in its level of consumption over the last decades. Tea production contributes significantly to the economy of several tea-cultivating countries in Asia and Africa. Environmental constrains, particularly water deficiency due to inadequate and/or poorly distributed rainfall, seriously limit tea production in the majority of tea-producing countries. It is also predicted that global climate change will have a considerable adverse impact on tea production in the near future. Application of fertilizers for higher production and increased quality and quantity of tea is a common agricultural practice, but due to its environmental consequences, such as groundwater pollution, the rate of fertilizer application needs to be reconsidered. Cultivation of tea under humid conditions renders it highly susceptible to pathogens and pest attacks. Application of pesticides and fungicides adversely affects the quality of tea and increases health risks of the tea beverage. Organic cultivation as an agricultural practice without using synthetic fertilizers and other chemical additives such as pesticides and fungicides is a sustainable and eco-friendly approach to producing healthy tea. A growing number of tea-producing countries are joining organic tea cultivation programmes in order to improve the quality and to maintain the health benefits of the tea produced.Ke y wor d s: aluminium, global climate change, nitrogen fertilizers, organic culture, phosphorus fertilizers, soil pH, water deficiency Abbreviations: C a -atmospheric CO 2 concentration, T a -atmospheric temperature, ESTs -estimated sequence tags, N sh -harvestable shoot density, W sh -harvestable shoot weight, C i -intracellular CO 2 concentration, T l -leaf temperature, P max -maximum photosynthetic rate, T m -maximum temperature, P n -net photosynthetic rate, T o -optimum temperature, PAR -photosynthetic active radiation, ROS -reactive oxygen species, SER -shoot extension rate, SRC -shoot replacement cycle, T s -soil temperature, SWD -soil water deficit, g s -stomatal conductance, SSH technique -suppression subtractive hybridization technique, T t -threshold temperature, TE -transpiration efficiency, VPD -vapour pressure deficit, WUE -water use efficiency

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“…In agreement with Jambunathan (2010), the formation of H2O2 and OH -occasioned higher rates of EL because they are highly reactive and interfere with the activities of the antioxidant enzymes. Apostol and Zwiazek (2004) observed an increase in EL when evaluating different B concentrations on the growth of Pinus banksiana.…”

Section: Discussionmentioning

confidence: 93%

Proline but not Glutathione Actively Participates in the Tolerance Mechanism of Young <i>Schizolobium parahyba</i> var. <i>amazonicum </i> Plants Exposed to Boron Toxicity

Silva

Lobato

Souza

et al. 2016

Not Bot Horti Agrobo

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Glutathione, a peptide frequently associated with the antioxidant mechanism of plants against reactive oxygen species, and proline, an amino acid whose function is related to cellular homeostasis, can both contribute to improve plant tolerance under situations of abiotic stress, such as boron toxicity. Aims of this research were to (i) quantify the oxidant and antioxidant compounds, (ii) evaluate the photosynthetic pigments, (iii) determine amino acids and PRO, and (iv) determine whether GSH and PRO contribute to the tolerance mechanisms in young Schizolobium parahyba var. amazonicum plants under B toxicity. This experiment tested five boron levels (25, 50, 100, 150 and 250 µM B), being evaluated physiological and biochemical variables. The values reported to proline levels presented significant variation for treatments with 50, 100, 150 and 250 µM B, with increases for the 150 and 250 µM B levels, being 45.2 and 52.4%, respectively. This study found that boron toxicity promoted similar behaviours in both the leaves and root, which included progressive increases in hydrogen peroxide, electrolyte leakage, amino acids and proline, and decreases in total glutathione, chlorophyll a, chlorophyll b and total chlorophyll, confirming that proline but not glutathione actively participates in the tolerance mechanism of young Schizolobium parahyba plants exposed to boron toxicity.

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Boron and water uptake in jack pine (Pinus banksiana) seedlings

Cited by 26 publications

References 28 publications

Responses of mycorrhizal jack pine (Pinus banksiana) seedlings to NaCl and boron

Responses of mycorrhizal jack pine (Pinus banksiana) seedlings to NaCl and boron

Environmental and nutritional requirements for tea cultivation

Proline but not Glutathione Actively Participates in the Tolerance Mechanism of Young <i>Schizolobium parahyba</i> var. <i>amazonicum </i> Plants Exposed to Boron Toxicity

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