Comparative Effects of Soil Moisture Stress and Restricted Root Zone Volume on Morphogenetic and Physiological Responses of Soybean [<i>Glycine max</i>(L.) Merr.]

Krizek, Donald T.; Carmi, A.; Mirecki, Roman M.; Snyder, F. W.; Bunce, James A.

doi:10.1093/jxb/36.1.25

Cited by 84 publications

(46 citation statements)

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“…The difference in plant height was consistent with the differences among pot size in stem diameter, number of branches, and vegetative dry weight of each plant. Similar results were observed in rooting volume experiments of tomato (Kemble et al 1994) and soybean (Krizek et al 1985). NeSmith & Duvak (1998) stated that reduced plant biomass under root restricting conditions could possibly be a result of lower photosynthetic rate; although few container size or root restriction experiments have measured photosynthetic rate.…”

Section: Discussionsupporting

confidence: 63%

“…Root restriction can increase root mass and the amount of fibrous roots (Bar-Tal et al 1995;Wang et al 1998Wang et al ,2001). Other studies have also suggested that root restriction may affect shoot growth through additional metabolism processes (Krizek et al 1985;Ismail & Noor 1996). For example, root restriction might alter plant water balance and consequently affect leaf growth (Hameed et al 1987;Peterson et al 1991).…”

Section: Introductionmentioning

confidence: 99%

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Growth, yield, and water use of okra (Abelmoschus esculentus) and eggplant (Solanum melongena) as influenced by rooting volume

Kurunç¹,

Ünlükara

2009

New Zealand Journal of Crop and Horticultural Science

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Many experiments are conducted in simulated confined spaces to provide controlled environments where plants are grown in pots with limited rooting volume to characterise fundamental physiological responses of plants to stress conditions such as soil water, soil salinity, irrigation water salinity, and plant nutrition. However, rooting volume in the pots can have a limiting effect on overall plant growth to varying degrees. This study was undertaken to quantify the effects of widely differing rooting volume on growth, yield, and water use of eggplant (Solanum melongena) and okra (Abelmoschus esculentus). Eggplant and okra experiments were conducted similarly, but as separate experiments. Both plants were grown in 3.6-litre (P1), 16-litre (P2), 36-litre (P3), and 52-litre (P4) pots. For eggplant and okra, evapotranspiration (ET) and all of the growth parameters including plant height, stem diameter, root and vegetative dry weight, root length, number of branches and fruit, and fruit yield significantly increased with increasing rooting volume. Pot volume started to affect plant height and ET after 3 weeks from transplanting. For both experiments, the highest yield and the highest yield based water-use efficiency (WUE yield ) were obtained from the P4 and P3 treatments, respectively. The highest WUE based on total biomass (WUE biomass ) was obtained from the P4 and P3 treatment of eggplant and okra, respectively. Both experiments exhibited similar morphological changes such as decreases in plant height, stem diameter, branching, root and vegetative dry weight, and root length to root restriction. As a result of this study it can be concluded that a pot size of 36 litres (P3) may be enough for okra growth, but even a 52-litre (P4) pot size may not provide unrestricted rooting volume for eggplant growth.

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Section: Discussionsupporting

confidence: 63%

Section: Introductionmentioning

confidence: 99%

Growth, yield, and water use of okra (Abelmoschus esculentus) and eggplant (Solanum melongena) as influenced by rooting volume

Kurunç¹,

Ünlükara

2009

New Zealand Journal of Crop and Horticultural Science

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“…However, other factors potentially limiting UV-B effectiveness in droughtstressed plants could occur at the physiological level. For example, it has been observed that drought may reduce plant phosphorus levels (16), and phosphorus deficiency has been shown to reduce the sensitivity of soybean to UV-B radiation (19). Also drought may delay cell division, in part through reduced cell elongation, which may play a role in the initiation of cell division (5).…”

Section: Discussionmentioning

confidence: 99%

Field Study of the Interaction between Solar Ultraviolet-B Radiation and Drought on Photosynthesis and Growth in Soybean

Sullivan¹,

Teramura²

1990

Plant Physiol.

185

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Soybean, Glycine max (L.) Merr. cv Essex, plants were grown in the field in a 2 x 2 factorial design, under ambient and supplemental levels of ultraviolet-B (UV-B) radiation (supplemental daily dose of 5.1 effective kilojoules per square meter) and were either well-watered or subjected to drought. Soil water potentials were reduced to -2.0 megapascals by the exclusion of natural precipitation in the drought plots and were maintained at approximately -0.5 megapascal by supplemental irrigation in well-watered plots. Plant growth and gas exchange characteristics were affected under both drought and supplemental UV-B radiation. Whole-leaf gas exchange analysis indicated that stomatal limitations on photosynthesis were only significantly affected by the combination of UV-B radiation and drought but substrate (ribulose bisphosphate) regeneration limitations were observed under either stress. The combined effect of both drought and UV-B radiation on photosynthetic gas exchange was a reduction in apparent quantum efficiency and the rapid appearance of biochemical limitations to photosynthesis concomitant with reduced diffusional limitations. However, the combination of stresses did not result in additive effects on total plant growth or seed yield compared to reductions under either stress independently.Reductions in global stratospheric ozone column thickness of 1.7 to 3.0% from 1969 to 1986 have recently been reported with seasonal reductions of up to 50% over the Antarctic (21). Such reductions are projected to result in increased solar UV-B2 radiation reaching the earth's surface. UV-B radiation has been shown to reduce plant biomass, leaf area, and photosynthetic capacity in soybean (Glycine max [L.] Merr.), and its '

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“…For example, it is known that plant growth and morphology, including both roots and shoots, can be modified by the volume available for root growth, independent of nutrition or moisture stress (e.g. Krizek et al 1985;Peterson et al 1991aPeterson et al , 1991b. The difficulties are accentuated when exploring root system traits that are expressed or become important later in the life cycle, such as around flowering or during grain filling, because of the limitations imposed by soil volume.…”

Section: Lessons From Individual Root Traits For Water Capturementioning

confidence: 99%

Large root systems: are they useful in adapting wheat to dry environments?

Palta

Chen

Milroy

et al. 2011

Functional Plant Biol.

253

187

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Abstract. There is little consensus on whether having a large root system is the best strategy in adapting wheat (Triticum aestivum L.) to water-limited environments. We explore the reasons for the lack of consensus and aim to answer the question of whether a large root system is useful in adapting wheat to dry environments. We used unpublished data from glasshouse and field experiments examining the relationship between root system size and their functional implication for water capture. Individual root traits for water uptake do not describe a root system as being large or small. However, the recent invigoration of the root system in wheat by indirect selection for increased leaf vigour has enlarged the root system through increases in root biomass and length and root length density. This large root system contributes to increasing the capture of water and nitrogen early in the season, and facilitates the capture of additional water for grain filling. The usefulness of a vigorous root system in increasing wheat yields under water-limited conditions maybe greater in environments where crops rely largely on seasonal rainfall, such as the Mediterranean-type environments. In environments where crops are reliant on stored soil water, a vigorous root system increases the risk of depleting soil water before completion of grain filling.Additional keywords: root biomass, root length, root length density, root system size, water capture.

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Comparative Effects of Soil Moisture Stress and Restricted Root Zone Volume on Morphogenetic and Physiological Responses of Soybean [Glycine max(L.) Merr.]

Cited by 84 publications

References 0 publications

Growth, yield, and water use of okra (Abelmoschus esculentus) and eggplant (Solanum melongena) as influenced by rooting volume

Growth, yield, and water use of okra (Abelmoschus esculentus) and eggplant (Solanum melongena) as influenced by rooting volume

Field Study of the Interaction between Solar Ultraviolet-B Radiation and Drought on Photosynthesis and Growth in Soybean

Large root systems: are they useful in adapting wheat to dry environments?

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