Improving agronomic water use efficiency in tomato by rootstock-mediated hormonal regulation of leaf biomass

Cantero-Navarro, Elena; Romero-Aranda, R.; Fernández-Muñoz, Rafael; Martínez‐Andújar, Cristina; Pérez‐Alfocea, Francisco; Albacete, Alfonso

doi:10.1016/j.plantsci.2016.03.001

Cited by 71 publications

(50 citation statements)

References 63 publications

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“…Interestingly, the ACC levels were depressed in the tolerant LcHp rootstocks, which showed increased growth under low-P. These ACC responses in contrasting rootstocks under low-P were similar to those observed under low-K (Martínez-Andújar et al, 2016), and under non-stress conditions in hydroponics (Cantero-Navarro et al, 2016), suggesting that ethylene-precursor is a constitutive or stress-induced root-to-shoot negative signal regulating shoot growth.…”

Section: Discussionsupporting

confidence: 60%

Hormonal and Nutritional Features in Contrasting Rootstock-mediated Tomato Growth under Low-phosphorus Nutrition

et al. 2017

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Grafting provides a tool aimed to increase low-P stress tolerance of crops, however, little is known about the mechanism (s) by which rootstocks can confer resistance to P deprivation. In this study, 4 contrasting groups of rootstocks from different genetic backgrounds (Solanum lycopersicum var. cerasiforme and introgression and recombinant inbred lines derived from the wild relatives S. pennellii and S. pimpinellifolium) were grafted to a commercial F1 hybrid scion and cultivated under control (1 mM, c) and P deficient (0.1 mM, p) conditions for 30 days, to analyze rootstocks-mediated traits that impart low (L, low shoot dry weight, SDW) or high (H, high SDW) vigor. Xylem sap ionic and hormonal anlyses leaf nutritional status suggested that some physiological traits can explain rootstocks impacts on shoot growth. Although xylem P concentration increased with root biomass under both growing conditions, shoot biomass under low-P was explained by neither changes in root growth nor P transport and assimilation. Indeed, decreased root P export only explained the sensitivity of the HcLp rootstocks, while leaf P status was similarly affected in all graft combinations. Interestingly, most of the nutrients analyzed in the xylem sap correlated with root biomass under standard fertilization but only Ca was consistently related to shoot biomass under both control and low-P, suggesting an important role for this nutrient in rootstock-mediated vigor. Moreover, foliar Ca, S, and Mn concentrations were (i) specifically correlated with shoot growth under low-P and (ii) positively and negatively associated to the root-to-shoot transport of the cytokinin trans-zeatin (t-Z) and the ethylene precursor 1-aminocyclopropane-1-carboxylic acid (ACC), respectively. Indeed, those hormones seem to play an antagonistic positive (t-Z) and negative (ACC) role in the rootstock-mediated regulation of shoot growth in response to P nutrition. The use of Hp-type rootstocks seems to enhance P use efficiency of a commercial scion variety, therefore could potentially be used for increasing yield and agronomic stability under low P availability.

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Section: Discussionsupporting

confidence: 60%

Hormonal and Nutritional Features in Contrasting Rootstock-mediated Tomato Growth under Low-phosphorus Nutrition

et al. 2017

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“…This was associated with the improved ability of luffa roots to sense changes in root-zone moisture, leading to a modest level of upward ABA transfer (Liu et al, 2016). Cantero-Navarro et al (2016) observed that rootstock-mediated ABA was positively correlated with scion photosynthetic parameters and instantaneous WUE. However, ethylene precursor 1-aminocyclopropane-1-carboxylic acid (ACC) was negatively correlated with leaf growth and water use, but did not limit fruit yield.…”

Section: Mechanisms Of Drought Resistance In Grafted Plantsmentioning

confidence: 95%

“…This causes heavy and economically relevant yield losses (Altunlu and Gul, 2012; Liu et al, 2014). Thus, it is a considerable challenge to develop scientific strategies for minimizing yield losses under drought conditions (Cantero-Navarro et al, 2016), to increase water use efficiency (WUE) of crops. WUE is defined as the ratio of the CO 2 assimilation rate and transpiration rate (instantaneous WUE), or the ratio of crop yield over the applied water (yield WUE).…”

Section: Introductionmentioning

confidence: 99%

Vegetable Grafting as a Tool to Improve Drought Resistance and Water Use Efficiency

et al. 2017

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Drought is one of the most prevalent limiting factors causing considerable losses in crop productivity, inflicting economic as well as nutritional insecurity. One of the greatest challenges faced by the scientific community in the next few years is to minimize the yield losses caused by drought. Drought resistance is a complex quantitative trait controlled by many genes. Thus, introgression of drought resistance traits into high yielding genotypes has been a challenge to plant breeders. Vegetable grafting using rootstocks has emerged as a rapid tool in tailoring plants to better adapt to suboptimal growing conditions. This has induced changes in shoot physiology. Grafting applications have expanded mainly in Solanaceous crops and cucurbits, which are commonly grown in arid and semi-arid areas characterized by long drought periods. The current review gives an overview of the recent scientific literature on root-shoot interaction and rootstock-driven alteration of growth, yield, and fruit quality in grafted vegetable plants under drought stress. Further, we elucidate the drought resistance mechanisms of grafted vegetables at the morpho-physiological, biochemical, and molecular levels.

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“…The present study aimed to examine the growth, photosynthesis, photosynthetic pigments, fluorescence, water use efficiency and non-structural carbohydrates (NSCs) of different grafting combinations under well-watered and drought stress conditions. The physiological characteristics and stress resistance of grafted plants are mainly influenced by the rootstock, as proved in many previous studies (Cantero-Navarro et al, 2016;Penella et al, 2016;Warschefsky et al, 2016;Huang et al, 2016). Therefore, we hypothesized that: (i) under well-watered conditions, P. cathayana scion grafting combinations have a better growth, and under drought stress conditions, S. rehderiana-rooted grafting combinations have a stronger resistance to drought stress; (ii) grafting can improve the drought resistance of Salicaceae plants, and grafting a P. cathayana scion onto a S. rehderiana rootstock provides the best survival under drought stress.…”

Section: Introductionmentioning

confidence: 57%

“…Since drought causes serious economic losses, researchers have used conventional or molecular approaches to develop new varieties with drought tolerance or resistance (Kasuga et al, 1999;Zhou et al, 2013;Kumar et al, 2014). As one of the most ancient horticultural techniques, grafting continues being applied to many plant production questions, including improved drought resistance or water use efficiency of plants (Cantero-Navarro et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Improved drought resistance by intergeneric graftingin Salicaceae plants under water deficits

Han

Luo

et al. 2018

Environmental and Experimental Botany

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Improved drought resistance by intergeneric grafting Highlights • Intergeneric grafting was conducted between P. cathayana and S. rehderiana. • P. cathayana scion grafting combinations have a better biomass accumulation. • S. rehderiana-rooted grafting combinations are more resistant to drought stress. • Grafting Populus scions onto Salix rootstocks is an effective way to provide drought resistance.

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Improving agronomic water use efficiency in tomato by rootstock-mediated hormonal regulation of leaf biomass

Cited by 71 publications

References 63 publications

Hormonal and Nutritional Features in Contrasting Rootstock-mediated Tomato Growth under Low-phosphorus Nutrition

Hormonal and Nutritional Features in Contrasting Rootstock-mediated Tomato Growth under Low-phosphorus Nutrition

Vegetable Grafting as a Tool to Improve Drought Resistance and Water Use Efficiency

Improved drought resistance by intergeneric graftingin Salicaceae plants under water deficits

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