Mineral Nutrition of Tomato under Diurnal Temperature Variation of Root and Shoot

Gent, Martin P.N.; Ma, Yong-Zhan

doi:10.2135/cropsci2000.4061629x

Cited by 17 publications

(14 citation statements)

References 27 publications

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“…Nevertheless, the same root N concentration was found at both 10 C and 20 C in Eucalyptus nitens (Garnett and Smethurst 1999). In contrast, we found higher N concentrations in roots at 10 C than those of 20 C. N element concentration, NO À 3 , and amino acids in leaves of tomato increased at all of the heated regimes: constant, day, and night root heating compared to no heating, while higher N concentration was found in no heated treatment than in heated treatments, as noted by Gent and Ma (2000). The extent of growth reduction showed direct relationships with solution N concentration and was inhibited by low root temperature, possibly due to reduced NO À 3 reductase in the plants (Atkin and Cummins 1994).…”

Section: Discussionsupporting

confidence: 64%

“…This might be due to the decrease in nutrient metabolic rates from root to shoot at low temperatures (Adam et al 2003). Gent and Ma (2000) also revealed that low temperatures restrained NO À 3 translocation from roots to leaves more than roots uptake from soils. A better understanding of the relationship between nutrient metabolism and transport from roots to shoots is needed and should be the subject of further study.…”

Section: Discussionmentioning

confidence: 91%

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Effects of root-zone temperature and N, P, and K supplies on nutrient uptake of cucumber (Cucumis sativusL.) seedlings in hydroponics

Yan

Duan

Mao

et al. 2012

Soil Science and Plant Nutrition

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The nutrient uptake and allocation of cucumber (Cucumis sativus L.) seedlings at different root-zone temperatures (RZT) and different concentrations of nitrogen (N), phosphorus (P), and potassium (K) nutrients were examined. Plants were grown in a nutrient solution for 30 d at two root-zone temperatures (a diurnally Fuctuating ambient 10 C-RZT and a constant 20 C-RZT) with the aerial parts of the plants maintained at ambient temperature (10 C-30 C). Based on a Hoagland nutrient solution, seven N, P, and K nutrient concentrations were supplied to the plants at each RZT. Results showed that total plant and shoot dry weights under each nutrient treatment were significantly lower at low root-zone temperature (10 C-RZT) than at elevated root-zone temperature (20 C-RZT). But higher root dry weights were obtained at 10 C-RZT than those at 20 C-RZT. Total plant dry weights at both 10 C-RZT and 20 C-RZT were increased with increased solution N concentration, but showed different responses under P and K treatments. All estimated nutrient concentrations (N, P, and K) and uptake by the plant were obviously influenced by RZT. Low root temperature (10 C-RZT) caused a remarkable reduction in total N, P, and K uptake of shoots in all nutrient treatments, and more nutrients were accumulated in roots at 10 C-RZT than those at 20 C-RZT. N, P, and K uptakes and distribution ratios in shoots were both improved at elevated root-zone temperature (20 C-RZT). N supplies were favorable to P and K uptake at both 10 C-RZT and 20 C-RZT, with no significantly positive correlation between N and P, or N and K uptake. In conclusion, higher RZT was more beneficial to increase of plant biomass and mineral nutrient absorption than was increase of nutrient concentration. Among the three element nutrients, increasing N nutrient concentration in solution promoted better tolerance to low RZT in cucumber seedlings than increasing P and K. In addition, appropriately decreased P concentration favors plant growth.

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Section: Discussionsupporting

confidence: 64%

Section: Discussionmentioning

confidence: 91%

Effects of root-zone temperature and N, P, and K supplies on nutrient uptake of cucumber (Cucumis sativusL.) seedlings in hydroponics

Yan

Duan

Mao

et al. 2012

Soil Science and Plant Nutrition

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“…This permanent flux of Ca to the fruits may have a pivotal role in maintaining an optimal level of Ca 2+ in the cytoplasm of fruit cells, as a factor for increasing the tolerance to high temperatures (Starck et al, 1994). On the other hand, only a few studies have examined the effect of differences in temperature regimes between day and night on the mineral status of fruits or vegetable foods, but low concentration of nitrate was observed as a consequence of variations in temperature in root and shoot Ca 2+ due to lower night air temperatures (Gent and Ma, 2000).…”

Section: Extreme Temperaturesmentioning

confidence: 99%

Minerals in plant food: effect of agricultural practices and role in human health. A review

Martínez-Ballesta

Domínguez‐Perles

Moreno

et al. 2010

Agron. Sustain. Dev.

190

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-Interest in nutrient absorption and accumulation is derived from the need to increase crop productivity by better nutrition and also to improve the nutritional quality of plants as foods and feeds. This review focuses on contrasting data on the importance for human health of food mineral nutrients (Ca, Mg, K, Na and P) and also the trace elements considered essential or beneficial for human health (Cr, Co, Cu, Fe, Mn, Mo, Ni, Se and Zn). In addition, environmental stresses such as salinity, drought, extreme temperatures and light conditions that affect mineral content were revised in the light that the effect of these factors depends on the species or cultivar, and the specific plant organ, as well as the intensity and duration of the stress. Differences between inorganic and organic fertilisation practices on the mineral levels were also analysed to evaluate the influence of external factors on the quality of plant-based foods.

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“…The floral developmental process depends on good nutrition, and many elements potentially limit floral development (Larcher, 1995). Mineral nutrition of tomato under diurnal temperature variation of root and shoot has been reported (Gent and Ma, 2000). Moreover, there are heat-tolerant and heat-intolerant tomato cultivars and comparative studies on photosynthesis, transpiration, stomatal conductance, and yield, carried out at the vegetative, flowering, and fruiting stages of growth (Nkansah and Ito, 1995a).…”

Section: Introductionmentioning

confidence: 99%

Season-Dependent Fruit Loading: Effect on Nutrient Homeostasis of Tomato Plants

Darawsheh¹,

Zerva²,

Bouranis³

2006

Journal of Plant Nutrition

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Greenhouse tomato plants were grown hydroponically during the period of lower temperatures of winter (LT) versus the period of higher temperatures of summer (HT). In these plants, the effect of season on fruit load was dramatic. In order to study the alterations season introduces to the developmental allocation of nutrients within the various organs, concentrations of total nitrogen (N), phosphorus (P), potassium (K), magnesium (Mg), calcium (Ca), iron (Fe), manganese (Mn), zinc (Zn), and copper (Cu) were determined during each season at weekly intervals in the dry mass of leaves and roots and in the extract of upper, middle, and lower parts of the stem. The level of N/ P ratio was always higher in the leaves than in the roots, and these differences were more intense during HT. The short-term changes of ratio in the leaves during HT and LT were positively related with the changes in temperature (r = 0.59 and 0.51 for HT and LT, respectively). In contrast, such correlations in the root were negative (r = −0.54 and r = −0.33 for HT and LT, respectively). The increase of temperature increased P uptake but not its translocation to upper plant parts. HT affected the translocation of N, K, Mg, and Ca more and their uptake less. Fruit load differentially affected the concentration of nutrients. In contrast to total N and K, Ca concentration in plant parts presented a positive relation with the increase of fruit load. Calcium and total N concentration (as opposed to P and micronutrient concentrations) were always higher in the leaves than in the roots. Under HT conditions, P was accumulated in roots in combination with high concentrations of Fe, Zn, and Mn. On the other hand, K and N were accumulated 505 Downloaded by [UQ Library] at 00:28 02 November 2014 506 M. K. Darawsheh et al.in the roots during the period of low temperature in winter. Calcium and K compared with other nutrients presented a pronounced tendency to be transported toward the top of the stem during HT, and their extractable concentration in the upper part of stem presented a significant increase during summer. Extractable K concentration was two to nine times higher than that of the other macronutrients. Our data suggest that the extractable concentration of nutrients of the stem is a good index for the diagnosis of the mineral nutritional status of the plant.

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Mineral Nutrition of Tomato under Diurnal Temperature Variation of Root and Shoot

Cited by 17 publications

References 27 publications

Effects of root-zone temperature and N, P, and K supplies on nutrient uptake of cucumber (Cucumis sativusL.) seedlings in hydroponics

Effects of root-zone temperature and N, P, and K supplies on nutrient uptake of cucumber (Cucumis sativusL.) seedlings in hydroponics

Minerals in plant food: effect of agricultural practices and role in human health. A review

Season-Dependent Fruit Loading: Effect on Nutrient Homeostasis of Tomato Plants

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