Evaluating variability of root size system and its constitutive traits in hot pepper (Capsicum annum L.) under water stress

Kulkarni, M.S.; Phalke, Swati

doi:10.1016/j.scienta.2008.10.007

Cited by 64 publications

(37 citation statements)

References 33 publications

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“…Due to the wide transpiring leaf surface and high stomatal conductance, pepper has high water requirements, and is therefore a good model plant for drought stress experiments (Alvino et al 1994;Doorenbos and Kassam 1986). The sensitivity of pepper to water deficit is demonstrated in a large number of publications dealing with physiological responses as well as plant growth and biomass production (Delfine et al 2001;De Pascale et al 2003;González-Dugo et al 2007;Ferrara et al 2011;Kulkarni and Phalke 2009;Sezen et al 2006;Smittle et al 1994;Sziderics et al 2010). In addition, findings demonstrate the sensitivity of pepper plants to light quality, including light-induced alterations in plant growth, dry matter partitioning and anatomical features of leaves and stems (Brown et al 1995;Schuerger et al 1997).…”

Section: Introductionmentioning

confidence: 95%

Acclimations to light quality on plant and leaf level affect the vulnerability of pepper (Capsicum annuum L.) to water deficit

2015

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We investigated the influence of light quality on the vulnerability of pepper plants to water deficit. For this purpose plants were cultivated either under compact fluorescence lamps (CFL) or light-emitting diodes (LED) providing similar photon fluence rates (95 µmol m(-2) s(-1)) but distinct light quality. CFL emit a wide-band spectrum with dominant peaks in the green and red spectral region, whereas LEDs offer narrow band spectra with dominant peaks at blue (445 nm) and red (665 nm) regions. After one-week acclimation to light conditions plants were exposed to water deficit by withholding irrigation; this period was followed by a one-week regeneration period and a second water deficit cycle. In general, plants grown under CFL suffered more from water deficit than plants grown under LED modules, as indicated by the impairment of the photosynthetic efficiency of PSII, resulting in less biomass accumulation compared to respective control plants. As affected by water shortage, plants grown under CFL had a stronger decrease in the electron transport rate (ETR) and more pronounced increase in heat dissipation (NPQ). The higher amount of blue light suppressed plant growth and biomass formation, and consequently reduced the water demand of plants grown under LEDs. Moreover, pepper plants exposed to high blue light underwent adjustments at chloroplast level (e.g., higher Chl a/Chl b ratio), increasing the photosynthetic performance under the LED spectrum. Differently than expected, stomatal conductance was comparable for water-deficit and control plants in both light conditions during the stress and recovery phases, indicating only minor adjustments at the stomatal level. Our results highlight the potential of the target-use of light quality to induce structural and functional acclimations improving plant performance under stress situations.

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Section: Introductionmentioning

confidence: 95%

Acclimations to light quality on plant and leaf level affect the vulnerability of pepper (Capsicum annuum L.) to water deficit

2015

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“…Other studies investigated, on a very limited number of cultivars, the effects of various environmental or cultural factors on particular root characteristics, such as total mass, length, or number (e.g., Gamalero et al 2004Gamalero et al , 2010Nakano 2007;Gautam et al 2012;Tracy et al 2012), or their depth distribution in the field (e.g., Thomas 1999;Gough 2001;Ibarra-Jimenez et al 2011). The genetic diversity of some root morphological attributes was addressed recently on peppers by Kulkarni and Phalke (2009) and by Peláez-Anderica et al (2011). These works pointed out large differences between cultivars regarding root length, number of lateral roots, and mean diameter.…”

Section: Introductionmentioning

confidence: 99%

Root system development and architecture in various genotypes of the Solanaceae family

Bui

Serra

Pagès

2015

Botany

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We present an extensive, dynamic, and quantitative study of the root system architecture of Solanaceae based on 29 genotypes from three important groups (aubergines, capsicums, and tomatoes). Quantitative traits were essentially obtained from measurements made on high resolution images of different plant parts at several stages. The developmental schema was common to all genotypes. Several traits showed significant genetic variations: root apical diameter (reflecting meristem size), interbranch distances, slopes of the regression lines of elongation rate versus apical diameter, and ratios of diameters of laterals to mother roots. On all genotypes, the initial root system was complemented by a strong adventitious system emerging near the plant collar, made up of a set of fast growing roots with large apical diameters. Correlations between traits were evidenced within the root systems on one hand (e.g., interbranch distance and diameter ratio of laterals to their mother) and between shoot and root on the other hand (e.g., leaf area growth rate and root elongation rate). They revealed both trade-offs in developmental processes and coordination between plant parts. Beyond these results, we demonstrated the importance of characterizing phenotypes through multiple criteria, considering the whole plant and including late stages.Résumé : Nous présentons une étude dynamique et quantitative de l'architecture racinaire des Solanaceae conduite sur 29 génotypes parmi trois groupes (aubergines, piments et tomates). Les traits quantitatifs ont été obtenus essentiellement à partir de mesures faites sur des images haute-résolution de différentes parties de la plante. Le schéma de développement est commun à tous les génotypes. Plusieurs traits présentent des variations génétiques significatives : diamètres apicaux des racines (reflétant la taille des méristèmes), ratio des diamètres entre racines latérales et racines mères, distances inter-ramification et pentes des régressions entre diamètre apical et vitesse d'élongation. Sur l'ensemble des génotypes, le système racinaire initial est complété par un système adventif puissant composé de multiples racines ayant de gros méristèmes apicaux. Des corrélations existent entre traits racinaires d'une part (p. ex. entre distance inter-ramification et ratio de diamètres des latérales sur leur mère) et entre traits aérien et racinaire d'autre part (p. ex. vitesse relative de croissance des feuilles et vitesse d'élongation de racines individuelles). Ces corrélations révèlent des compromis de développement et des coordinations entre parties de la plante. Au-delà des résultats, nous avons démontré l'intérêt de caractériser les phénotypes racinaires à travers de multiples critères, en considérant aussi la plante entière et en intégrant des stades avancés.

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“…The distribution of assimilates from the aerial part to the root system in water stress situations has been observed by several authors in different species, such as Capsicum annuum (Davies et al 2002;Kulkarni and Phalke 2009;Shao et al 2010), Lonicera implexa , Lotus creticus (Franco et al 2001;Bañón et al 2004), Lupinus havardii (Niu et al 2007), Myrtus communis (Bañón et al 2002), Nerium oleander Niu et al 2008), Opuntia ficus-indica and Opuntia robusta (Snyman 2004 Franco et al 2008), Limonium cossonianum (Franco et al 2002) and Argyranthemum coronopifolium (De Herralde et al 1998).…”

Section: Root To Shoot Ratiomentioning

confidence: 92%

“…This was the case with L. creticus in a study by Bañón et al (2004), who reported that plants subjected to deficit irrigation showed a higher density of xylem vessels in their roots than well-watered plants. Drought also caused a decrease in the diameter of root metaxylem vessels, increasing water flow resistance in C. annuum (Kulkarni and Phalke 2009), although a combination of larger and smaller xylem vessels provided better stress tolerance and biomass production under water-deficit conditions. Increased water flow resistance from the substratum to the plant in water stress conditions has been observed in many species (De Herralde et al 1998;Sánchez-Blanco et al 2002), while no significant differences in root hydraulic resistance were observed in geranium plants submitted to a variety of different irrigation strategies (Á lvarez et al 2013).…”

Section: Root Hydraulic Conductivitymentioning

confidence: 99%

Root System Response to Drought and Salinity: Root Distribution and Water Transport

et al. 2014

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Evaluating variability of root size system and its constitutive traits in hot pepper (Capsicum annum L.) under water stress

Cited by 64 publications

References 33 publications

Acclimations to light quality on plant and leaf level affect the vulnerability of pepper (Capsicum annuum L.) to water deficit

Acclimations to light quality on plant and leaf level affect the vulnerability of pepper (Capsicum annuum L.) to water deficit

Root system development and architecture in various genotypes of the Solanaceae family

Root System Response to Drought and Salinity: Root Distribution and Water Transport

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