The Effects of Elevated Root Zone Temperature on the Development and Carbon Partitioning of Spring Wheat

Monje, Oscar; Anderson, Sylvia L.; Stutte, Gary W.

doi:10.21273/jashs.132.2.178

Cited by 6 publications

(3 citation statements)

References 34 publications

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“…Roots can adjust their morphological, biochemical, and physiological traits in response to RZT [52][53][54][55]. It was reported that the response of plant growth rates to high air temperatures was influenced by RZT [56]. Since the late 1970s, a few studies have even demonstrated that RZT is more critical than air temperature in enhancing plant growth [57][58][59][60][61].…”

Section: Greenhouse Through Manipulation Of Root-zone Temperature (Rzt)mentioning

confidence: 99%

Enhancing Productivity and Improving Nutritional Quality of Subtropical and Temperate Leafy Vegetables in Tropical Greenhouses and Indoor Farming Systems

2024

Horticulturae

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The total land used for land-based food farms is less than 1% in Singapore. As a result, more than 90% of Singapore’s food needs are imported. To strengthen food security, Singapore has set a target to develop the capability and capacity of the agri-food industry to locally produce 30% of its nutritional needs by 2030. To achieve this goal, technology is the key to helping farms to “grow more with less”. This review first discusses how aeroponic systems have been adapted for growing all kinds of leafy vegetables in the tropics through the manipulation of root-zone temperature and heat priming to save power energy. Growing vegetable crops indoors and in greenhouses not only allows the growers to achieve high productivity but also enables them to enhance nutritional values. The second part of this paper emphasizes how to achieve substantial yield through deficit irrigation with higher nutritional quality in a cost-effective manner. Growing crops vertically has become increasingly popular, as it increases land use. We establish a commercially viable LED-integrated aeroponic system to grow vegetables vertically. The last part of the paper discusses the impacts of LED spectral quality, quantity, and duration on vegetable production.

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Section: Greenhouse Through Manipulation Of Root-zone Temperature (Rzt)mentioning

confidence: 99%

Enhancing Productivity and Improving Nutritional Quality of Subtropical and Temperate Leafy Vegetables in Tropical Greenhouses and Indoor Farming Systems

2024

Horticulturae

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“…Additionally, high root zone temperatures have been recognized to affect the production of hormones synthesized in the roots and transported to the shoots thereby altering the sink-source relationship between shoots and roots (Wahid et al 2007, Hao et al 2012, Huang et al 2012. Nonetheless, extended exposure of roots to high temperatures can reduce carbon exchange rates, increase respiration, and alter saccharide allocation (Rachmilivitch et al 2015) as well as photosynthetic performance (Monje et al 2007), which negatively influence the growth of aboveground tissues and/or the whole plant metabolism (Benlloch-González et al 2017). Subsequently, root zone temperature is an important factor in leaf stress perception and responses (Suzuki et al 2008(Suzuki et al , 2011.…”

Section: Introductionmentioning

confidence: 99%

“…The developmental stage at which plants are exposed to heat stress may affect the extent of damages experienced by the crop (Wahid et al 2007). High-temperature injury increases dramatically within the flowering time which can result in a failure of fruit set due to the defect in pollen developmental processes and pollination inducing flower sterility (Morrison et al 2016, Müller et al 2016. In this study, the tomato was used as a model plant.…”

Section: Introductionmentioning

confidence: 99%

Effects of high growth-medium temperature under controlled conditions on characteristics of tomato leaves

Salem¹,

Smiti²,

Petřivalský³

2022

Biol. plant.

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High temperatures have become a major threat that seriously affects crop growth and yield. The present work aimed to investigate the acclimation process in adjusting plant responses to high root temperatures. Tomato (Solanum lycopersicum L., cv. Micro-Tom) during the flowering time was subjected to heat treatments (day/night temperatures at the root level of 40 or 45 °C for 4 d) while control plants were maintained at 25 °C, and the heat-stress treatment effects were analysed in the tomato leaves. The results showed a reduction in the content of chlorophylls a and b as well as chlorophyll a/b ratio at both high temperatures. Further, the increase in the amount of malondialdehyde as an indicator of lipid peroxidation was greater at 45 °C. The leaf content of hydrogen peroxide was induced in tomato plants subjected to 45 °C whereas it was markedly decreased in plants maintained at 40 °C as compared to control plants. Antioxidant enzymes showed higher activity in tomatoes treated at 45 °C compared to those treated at 40 °C. Moreover, the highest amount of antioxidants such as carotenoids and ascorbate in tomato plants were found at a temperature of 45 °C. Collectively, we provide evidence that physiological and biochemical components can be altered depending on the heat level, exposure time, and developmental stage. The interaction of root and shoot under high temperatures must be further characterized in terms of understanding the challenging climate changes.

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Heat Stress and Roots

Heckathorn

Giri

Mishra

et al. 2013

Climate Change and Plant Abiotic Stress Tolerance

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As with above-ground tissues, plant roots can be subjected to stressful high temperatures that can limit whole-plant function and decrease crop productivity. Further, with impending climate change, the frequency, duration, and severity of root heat stress will increase. In comparison to shoot function, especially photosynthesis, much less is known regarding heat stress and roots. Most previous research on roots and heat stress has been conducted on detached roots or by heating only roots or parts of root systems (but not shoots too) in intact herbaceous plants, and most past studies on intact plants have imposed chronic heat stress, with few examining effects of abrupt heat stress (e.g., heat waves). Importantly, plant responses to heat stress often differ in detached roots or when only roots are heated, compared to plants wherein both shoots and roots (or shoots only) are heated, and responses to chronic and abrupt heat stress can differ. Hence, many past results do not inform as to how natural heat stress often impacts roots in intact plants or do not inform as to the effects of heat waves on roots. Both chronic and abrupt heat stress can decrease root growth and function, including nutrient and water uptake, and studies in which both roots and shoots were heat-stressed indicate that roots are often more sensitive to heat stress than shoots. Heat stress may affect roots both directly and indirectly, and indirect effects likely involve decreases in shoot carbon provided to roots or changes in root water relations driven by increased shoot water demand, which then affect root growth and nutrient uptake. Interactive effects between heat stress and other global environmental change factors (e.g., elevated carbon dioxide, drought) on roots are likely. We conclude that further research on roots and heat stress is strongly warranted.

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The Effects of Elevated Root Zone Temperature on the Development and Carbon Partitioning of Spring Wheat

Cited by 6 publications

References 34 publications

Enhancing Productivity and Improving Nutritional Quality of Subtropical and Temperate Leafy Vegetables in Tropical Greenhouses and Indoor Farming Systems

Enhancing Productivity and Improving Nutritional Quality of Subtropical and Temperate Leafy Vegetables in Tropical Greenhouses and Indoor Farming Systems

Effects of high growth-medium temperature under controlled conditions on characteristics of tomato leaves

Heat Stress and Roots

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