Influence of root zone restriction on mineral element concentration, water potential, chlorophyll concentration, and partitioning of assimilate in spreading euonymus (<i>E. Kiautschovica</i>Loes. ‘Sieboldiana')

Dubik, Stephen P.; Krizek, Donald T.; Stimart, Dennis P.

doi:10.1080/01904169009364109

Cited by 43 publications

(27 citation statements)

References 24 publications

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“…This might indicate that the small pots limit the amount of nitrogen within the foraging space of the roots and that reduced growth was due to a shortage of nitrogen. Changes in root structure might have contributed to lower uptake (Peterson et al, 1984;Dubik et al, 1990). On the other hand, if growth regulator signals were altered by physical confinement of the roots or by slight drying of roots around the periphery of the pots there might have been decreased demand for nitrogen.…”

Section: Discussionmentioning

confidence: 99%

“…The effects of growing plants in small pots has been extensively investigated for arable and horticultural crops (Carmi & Heuer, 1981;Carmi et al, 1983;Peterson et al, 1984;Dubik, Krized & Stimart, 1990). In many of these studies it is unclear whether reduced growth occurred as a result of deficiency of water or nutrients, or was due to changes in the production of plant growth regulators.…”

Section: Discussionmentioning

confidence: 99%

“…In many of these studies it is unclear whether reduced growth occurred as a result of deficiency of water or nutrients, or was due to changes in the production of plant growth regulators. In order to determine which of these factors might be responsible, in several cases a physical restraint on root growth was applied, whilst w-ater and nutrient levels were maintained; in all these cases, growth was still reduced (Carmi et al, 1983;Peterson et al, 1984;Dubik et al, 1990), implying that reduction is not due solely due to deficiency of water or nutrients. Although changes in root architecture and morphology can lead to a reduced uptake of water and nutrients (Hameed et al, 1987), Carmi & Heuer (1981) argue that the decrease in growth of restricted plants may be attributable to changes in production of growth regulators.…”

Section: Discussionmentioning

confidence: 99%

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Interactive effects of ozone and soil volume on Plantago major

1996

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SUMMARYPlantago major L. ssp. major usually grows on trampled paths, tracks and gateways, and its root system is often restricted by compaction or by a limited volume of soil. In this heterogeneous environment, individuals close to each other will experience variable degrees of root restriction. As some populations of P. major have been demonstrated to be sensitive to ozone, the aim of this study was to investigate the effect of root restriction on the response of P. major to ozone.It was hypothesized that root restriction should reduce the effects of ozone. If this is true it would have implications for evolution of ozone resistance. A single population of P. major was grown in controlledenvironment chambers and exposed to either charcoal/Purafil-filtered air or to ozone (70 nl O3 1"^^ for 7 h d"~^). Plants were grown in pots of four different volumes: 0-175 1; 0-365 1; 2-280 1; and 5-830 1. Four harvests were performed, at 21, 37, 51 and 91 d from germination. At the final harvest, the total nitrogen content of leaf tissue was analysed and compared with that of plants collected from the field. Stomatal conductance {g^ and net carbon assimilation {A) rate were also recorded during development.Plants grown in the smallest pots exhibited severely impaired growth, lower ^^ and lower A than non-restricted plants. Root growth w-as less impaired than shoot growth. However, only plants in the smallest pots resembled those found in the field, which implies that realistic assessment of ozone effects on this species should involve a degree of root restriction. Appearance and leaf nitrogen content of leaves suggested that root restriction may have caused nitrogen deficiency. Contrary to the initial hypothesis, exposure to ozone reduced the grow-th of plants in all sizes of pot. Stomatal conductance was consistently lower in plants exposed to O3, but there w'as no effect of ozone on A.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Interactive effects of ozone and soil volume on Plantago major

1996

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“…Many investigators report that root restriction decrease vegetative growth, and alter the metabolism of vegetative organs (Wang et al, 2001;Zhu et al, 2006). Root restriction decreased leaf nitrogen content of Euonymus (Dubik et al, 1990), grapevine (Zhu et al, 2006), and peach (Mark and Marra, 1994;Boland et al, 2000), which may reduce the rate of leaf expansion (Radin, 1983;Gastal and Nelson, 1994).…”

Section: Introductionmentioning

confidence: 99%

Effect of root restriction on vegetative growth and leaf anatomy of Kyoho grapevines cultivar

Xie¹,

Guo²,

Cao³

2013

Afr. J. Agric. Res.

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The effects of root restriction on leaf and shoot growth and leaf anatomy of grape were investigated. Root restriction delayed leaf appearance, decreased leaf growth and reduced the rate of leaf expansion during all stage of berry development. Shoot growth of root-restricted vines was also reduced, with the length and thickness of shoots being lower than those of the control. Root restriction also induced adaptive changes in the leaf anatomy. Somata density of leaves from root-restricted vines was higher than that of controls, but the size of the stomata was smaller. The thickness of the leaf, cuticle, palisade layer, spongy mesophyll, and leaf structure tense ratio (CTR) were increased, however, the leaf tissue loose ratio (SR) and the size of guard cells were decreased. In conclusion, our results suggest that root restriction not only reduces growth of vegetative organ, but also alters their anatomy. These changes may be one of the reasons that change the physiological functions of the leaf.

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“…When seedlings are grown in small containers, the development of roots is restricted, causing stress (Di Benedetto & Pagani, 2013). Root restriction is hypothesized as a process that reduces the supply of assimilates to the shoots due to the decrease in root and leaf growth, leaf area and root volume (Di Benedetto, 2011), as well as changes in the partition of dry matter and nutrient absorption (Bar-Tal & Pressman, 1996;Dubik et al, 1990) and hormone metabolism (Peterson et al, 1991).…”

Section: Introductionmentioning

confidence: 99%

Production of Antirrhinum majus seedlings on different substrates and containers

Silva¹,

Dotto²,

Hajar³

et al. 2017

Científica

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The aim of this study was to determine the effects of type of substrate and expanded polystyrene trays on the production of snapdragon seedlings. The experiment was completely randomized with a 3 x 2 factorial design (substrates x number of tray cells) and four replications. 'Baixa Sortida' snapdragon seeds, commercial substrate A (rice husk + vermiculite), commercial substrate B (Sphagnum + torrefied rice straw + perlite), A + B mixture (1:1) and expanded polystyrene trays with 72 and 128 cells were used. The characteristics evaluated were plant emergence rate, percentage of plant emergence at 14, 21, 28 and 35 days, number of leaves at 44 and 58 days after sowing, shoot height, root length and plant dry matter. The results showed that the substrates directly influenced the production of snapdragon seedlings. Seedling emergence and seedling development is favored by the mixture of the substrates A and B (1:1) as well as by the use of expanded polystyrene trays with 72 cells due to the higher volume available to the seedling.

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Influence of root zone restriction on mineral element concentration, water potential, chlorophyll concentration, and partitioning of assimilate in spreading euonymus (E. KiautschovicaLoes. ‘Sieboldiana')

Cited by 43 publications

References 24 publications

Interactive effects of ozone and soil volume on Plantago major

Interactive effects of ozone and soil volume on Plantago major

Effect of root restriction on vegetative growth and leaf anatomy of Kyoho grapevines cultivar

Production of Antirrhinum majus seedlings on different substrates and containers

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