Leaf Abscission Induced by Ethylene in Water-Stressed Intact Seedlings of Cleopatra Mandarin Requires Previous Abscisic Acid Accumulation in Roots

Gómez-Cádenas, Aurelio; Tadeo, Francisco R.; Talón, Manuel; Primo‐Millo, Eduardo

doi:10.1104/pp.112.1.401

Cited by 196 publications

(188 citation statements)

References 9 publications

Supporting

Mentioning

144

Contrasting

Unclassified

Order By: Relevance

“…Different authors have associated the decrease in FW or DW with a reduction in the number of leaves or in leaf abscissions (Table 1). To offer an explanation, some experiments have shown that a specific Cl − build-up in the leaves of salt-stressed plants triggers 1-aminocyclopropane-1-carboxilic acid (ACC) synthesis and its conversion to ethylene with high efficiency, releasing enough hormone to trigger leaf abscission as occurred in citrus leaves and other plants [58][59][60][61]. Salt and osmotic stress also promoted the conversion of ACC to ethylene in the halophyte Allenrolfea occidentalis [62].…”

Section: Introductionmentioning

confidence: 99%

Plant Responses to Salt Stress: Adaptive Mechanisms

Acosta‐Motos¹,

Ortuño²,

Bernal‐Vicente³

et al. 2017

Preprint

375

200

View full text Add to dashboard Cite

This review deals with the adaptive mechanisms that plants can implement to cope with the challenge of salt stress. Plants tolerant to NaCl implement a series of adaptations to acclimate to salinity, including morphological, physiological and biochemical changes. These changes include increases in the root/canopy ratio and in the chlorophyll content in addition to changes in the leaf anatomy that ultimately lead to preventing leaf ion toxicity, thus maintaining the water status in order to limit water loss and protect the photosynthesis process. Furthermore, we deal with the effect of salt stress on photosynthesis and chlorophyll fluorescence and some of the mechanisms thought to protect the photosynthetic machinery, including the xanthophyll cycle, photorespiration pathway, and water-water cycle. Finally, we also provide an updated discussion on salt-induced oxidative stress at the subcellular level and its effect on the antioxidant machinery in both salt-tolerant and salt-sensitive plants. The aim is to extend our understanding of how salinity may affect the physiological characteristics of plants.

show abstract

Section: Introductionmentioning

confidence: 99%

Plant Responses to Salt Stress: Adaptive Mechanisms

Acosta‐Motos¹,

Ortuño²,

Bernal‐Vicente³

et al. 2017

Preprint

375

200

View full text Add to dashboard Cite

show abstract

“…This abscission may be due to hormonal imbalance and enhanced synthesis of the endogenous plant hormones ethylene (Gomez-Cadenas et al, 1996). In water stress conditions (50% and 25% FC) 'Rabab' cultivar had higher RWC than 'Shi Medrano shehgap'.…”

Section: Discussionmentioning

confidence: 99%

Antioxidant and carbohydrate changes of two pomegranate cultivars under deficit irrigation stress

Ebtedaie

Shekafandeh

2017

Span. j. agric. res.

View full text Add to dashboard Cite

The purpose of this study was to evaluate the biochemical responses to water stress tolerance of two pomegranate cultivars, 'Rabbab' and 'Shishehgap'. After the establishment of rooted stem cuttings of both cultivars under greenhouse conditions, they were treated with four levels of deficit irrigations (100%, 75%, 50% and 25% of field capacity) in a completely randomized design with four replications. The results showed a significant difference between the two cultivars regarding antioxidant enzymes activities. In both cultivars, the water stress increased the activity of superoxide dismutase, catalase and ascorbate peroxidase. However, at high water deficit (25% field capacity, FC), 'Rabbab' showed significantly higher enzyme activity than 'Shishehgap'. In each level of irrigation, there were not considerable differences in peroxidase activity between the two cultivars. An increment of 162% and 65.5% in soluble sugar was gained at 50% FC in 'Rabbab' and 'Shishehgap', respectively. 'Rabbab' showed better growth performance in each level of irrigation than 'Shishehgap'. Therefore, it can be concluded that 'Rabbab', with lesser decline in leaf relative water content (RWC), a strong antioxidant system and accumulation of more soluble carbohydrates, can resist higher water stress than 'Shishehgap'.Additional key words: field capacity; enzyme activity; Punica granatum L.; water stress. Abbreviation used: APX (ascorbate peroxidase); CAT (catalase); DW (dry weight); FC (field capacity); FW (fresh weight); NBT (nitro blue tetrazolium); POD (peroxidase); ROS (reactive oxygen species); RWC (leaf relative water content); SOD (superoxide dismutase).

show abstract

“…However, other research lines showed that stomatal closure occurs independently of the increase in xylem ABA concentration Dodd et al, 2008b;Puertolas et al, 2014;Carvalho et al, 2016). Additionally, further evidence contrasted with the original model such as the ability of leaves to synthetize by themselves large amounts of ABA (Gómez-Cadenas et al, 1996;Holbrook et al, 2002;Christmann et al, 2005) or the low ability of roots to accumulate carotenoids, the ABA direct precursors (Parry and Horgan, 1992;Ruiz-Sola et al, 2014;.…”

Section: Discussionmentioning

confidence: 99%

“…In this case, investigations should consider the longer distance existing between green tissues and roots in woody plants and not only the structural and anatomical differences (Popko et al 2010). To this respect, Citrus has been successfully used as a tree model for studying plant responses to environmental stress (de Ollas et al 2013, Gómez-Cadenas et al 1996, Pérez-Clemente et al 2012). …”

Section: )mentioning

confidence: 99%

“…After that period, a subset of girdled and non-girdled (control) plants were subjected to water stress treatments by transplanting them to dry perlite. This procedure does not induce any significant change in hormonal pattern derived from the transplanting (unlike those induced by damage or wounding) and allows an homogeneous dehydration among treatments as previously demonstrated in de Ollas et al (2013) and Gómez-Cadenas et al (1996). Plants of each scion/stock combination were transplanted to dry perlite.…”

Section: Citrus Experimentsmentioning

confidence: 99%

See 1 more Smart Citation

Involvement of aerial organs on the ABA accumulation in roots of Citrus plants under water deficit

Fraga¹,

Jesús²

View full text Add to dashboard Cite

HACEN CONSTAR QUE:Matías Jesús Manzi Fraga, Ingeniero Agrónomo por la Universidad de la República de Uruguay y Máster en Técnicas Cromatográficas Aplicadas por la Universitat Jaume I, ha realizado la bajo su dirección el trabajo que, titulado 'Involvement of aerial organs on the ABA accumulation in roots of Citrus plants under water deficit' reúne las condiciones necesarias para optar al grado de Doctor. Dr. Aurelio Gómez CadenasDr. Vicent Arbona Mengual Castellón de la Plana, Mayo 2016 AGRADECIMIENTOSAcá sí que me tengo a esmerar ya que conozco a unos cuantos (vagos) que solamente van a leer esta sección, incluso hay varios que están esperando a que salga la película para no leer!!! Se imaginarán que son muchas las personas a las que agradecer, no solo por la tesis sino también para que la tremenda experiencia por tierras levantinas. No voy a especificar los motivos porque sino no termino nunca, pero estoy seguro que cada uno sabe lo agradecido que estoy.En primera instancia, a mis directores, Aurelio y Vicent, que me permitieron realizar ésta tesis. Sin lugar a dudas, el aprendizaje ha sido tremendo. Cada experiencia ayuda a crecer y por lo tanto no tengo más que palabras de agradecimiento.Por supuesto que a Rosa, gran flechadora de canchas si las hay!!! Que a més a més, no sólo no me va a complicar la vida en la presentación, sino que me aguantó durante cientos de kms. Lo quiero dejar bien clarito acá, no solo es una excelente conductora y mi vida nunca estuvo en riesgo, sino que además no tiene un pelo de chirusa. Moltes gracies Rose! A mis compas de labo: Tico, Sara, María, Marta, Alejandro, Vale, que lo hemos pasado bien de bien durante todo este tiempo "hashiendo coshash". No me alcanzan las palabras para agradecerles por tantas y tantas manos. Así que adapté una frase célebre para decirles que: "es Matías el que elige a los amigos y son los amigos los que quieren que sea Matías el amigo. Muchash grashiash!!!" (Fin de la cita).Además, recordar en la UJI a Elvira y Pilar con los papeles y las plantas, a Carlos y Jorge del labo, a los vecinos, Merche, Raúl, Loredana, Emma, Victoria y por supuesto a Table S1. ABA, β,β-carotenoid and total carotenoid content in shoots of CT plants in response to PEG………………………………………………………………………………………..………………………… 83 Table S2. Sequences of the primers used for qRT-PCR………………………………………………… 84Chapter III Supporting information Table S1. Globally, this thesis provides evidence that roots of Citrus plants are not an important source of ABA under water deficit and conversely, leaves sustain the accumulation of ABA in those dehydrated roots. Furthermore, data present here suggest that leaves are key not only in providing ABA to roots but also in triggering the water stress responses which lead to the ABA accumulation in both, leaves and roots. RESUMENLa sequía es una de las situaciones más perjudiciales para el crecimiento y la supervivencia de las plantas. Sin embargo, las plantas han desarrollado diversas estrategias para afrontar dichas condiciones, incluyendo la rápida señalización...

show abstract

Leaf Abscission Induced by Ethylene in Water-Stressed Intact Seedlings of Cleopatra Mandarin Requires Previous Abscisic Acid Accumulation in Roots

Cited by 196 publications

References 9 publications

Plant Responses to Salt Stress: Adaptive Mechanisms

Plant Responses to Salt Stress: Adaptive Mechanisms

Antioxidant and carbohydrate changes of two pomegranate cultivars under deficit irrigation stress

Involvement of aerial organs on the ABA accumulation in roots of Citrus plants under water deficit

Contact Info

Product

Resources

About