Hormones from roots as signals for the shoots of stressed plants

Jackson, Michael B.

doi:10.1016/s1360-1385(96)10050-9

Cited by 167 publications

(89 citation statements)

References 35 publications

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“…The shoot growth of plants was not affected by bacterial inoculation, whereas only P. chlororaphis TSAU 13 significantly stimulated shoot dry weight (33%) of bean. It is thought that the depressive effect of salinity on plant growth could be related to a decline in endogenous levels of hormones (Zholkevich and Pustovoytova 1993, Jackson 1997, Debez et al 2001, Sakhabutdinova et al 2003. In Table 1.…”

Section: Resultsmentioning

confidence: 99%

“…It is thought that the repressive effect of salinity on germination and plant growth could be related to a decline in endogenous levels of plant growth hormones or phytohormones (Jackson 1997, Debez et al 2001. It is also suggested that root-colonising bacteria which produce phytohormones, when bound to the seed coat of a developing seedling, may act as a mechanism for plant growth stimulation and these organisms can prevent the deleterious effects of stresses from the environment (Lindberg et al 1985, Frankenberger andArshad 1995).…”

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confidence: 99%

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Survival of Pseudomonas extremorientalis TSAU20 and P. chlororaphis TSAU13 in the rhizosphere of common bean (Phaseolus vulgaris) under saline conditions

Egamberdieva¹

2011

Plant Soil Environ.

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The abilities of Pseudomonas extremorientalis TSAU20 and P. chlororaphis TSAU13 to colonise and survive in the rhizosphere of common bean under saline conditions were studied. Four salinity levels (5.0, 7.5, 10.0, and 12.5 dS/m) were maintained in the gnotobiotic system using NaCl salt. Results showed that with increasing salt content root-tip colonization of both bacterial strains was reduced. Both bacterial treatments used in the study intcreased root and/or shoot length compared to non-treated plants at each NaCl concentration tested, whereas shoot growth was not stimulated at high saline condition (12.5 dS/m). In conclusion, the results of this study indicated that P. extremorientalis TSAU20 and P. chlororaphis TSAU 13 have the ability to survive in ecologically stressed conditions, such as saline and nitrogen deficient soils, and may positively effect on plant growth of bean. High saslinity inhibited their colonisation in the rhizosphere of bean and thus their stimulatory effect on plants was also reduced.

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Section: Resultsmentioning

confidence: 99%

mentioning

confidence: 99%

Survival of Pseudomonas extremorientalis TSAU20 and P. chlororaphis TSAU13 in the rhizosphere of common bean (Phaseolus vulgaris) under saline conditions

Egamberdieva¹

2011

Plant Soil Environ.

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“…Moreover, interactions of both ABA and ET with other molecular players of the signaling network have been reported and thus these phytohormones may affect plant defenses against insect herbivores (de Torres-Zabala et al 2009;Jiang et al 2010;Kazan and Manners 2012;Pieterse et al 2012). The role of ABA and ET in BG-AG interactions has been shown (Jackson 1997;Erb et al 2009a). For example, ABA levels were increased systemically after BG herbivory in maize plants .…”

Section: Aboveground and Belowground Inducible Defenses-the Role Of Pmentioning

confidence: 99%

Mechanisms and ecological implications of plant‐mediated interactions between belowground and aboveground insect herbivores

Papadopoulou

Dam

2016

Ecological Research

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Plant-mediated interactions between belowground (BG) and aboveground (AG) herbivores have received increasing interest recently. However, the molecular mechanisms underlying ecological consequences of BG-AG interactions are not fully clear yet. Herbivore-induced plant defenses are complex and comprise phytohormonal signaling, gene expression and production of defensive compounds (defined here as response levels), each with their own temporal dynamics. Jointly they shape the response that will be expressed. However, because different induction methods are used in different plant-herbivore systems, and only one or two response levels are measured in each study, our ability to construct a general framework for BG-AG interactions remains limited. Here we aim to link the mechanisms to the ecological consequences of plant-mediated interactions between BG and AG insect herbivores. We first outline the molecular mechanisms of herbivore-induced responses involved in BG-AG interactions. Then we synthesize the literature on BG-AG interactions in two well-studied plant-herbivore systems, Brassica spp. and Zea mays, to identify general patterns and specific differences. Based on this comprehensive review, we conclude that phytohormones can only partially mimic induction by real herbivores. BG herbivory induces resistance to AG herbivores in both systems, but only in maize this involves drought stress responses. This may be due to morphological and physiological differences between monocotyledonous (maize) and dicotyledonous (Brassica) species, and differences in the feeding strategies of the herbivores used. Therefore, we strongly recommend that future studies explicitly account for these basic differences in plant morphology and include additional herbivores while investigating all response levels involved in BG-AG interactions.

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“…Salinity stress limits plant development by adversely affecting various biochemical reactions and physiological processes such as photosynthesis, antioxidant metabolism, mineral nutrients homeostasis, osmolytes accumulation and hormonal signaling [3,4]. It is thought that the repressive effect of salinity on plant growth could be related to a decline in endogenous levels of phytohormones [5]. Furthermore high salt stress increases the deposition rate of Na in the growing zone of the root and hence decreases the selectivity for potassium (K) versus Na [6].…”

Section: Introductionmentioning

confidence: 99%

The effectiveness of zinc in alleviating salinity stress on pistachio seedlings

Tavallali

2016

Fruits

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-Introduction. Zinc (Zn) deficiency is a common nutritional disorder in Pistachio (Pistacia vera) which is grown on calcareous, saline and sodic soils. The effects of Zn amendment on the mineral nutrient uptake, the osmoregulation and the dynamics of phytohormones in pistachio under salt stress were investigated in the common conditions of Iran Materials and methods. A greenhouse study was conducted to evaluate the improving effects of zinc (0, 5, 10 and 20 mg Zn kg −1 soil) under saline (800, 1600, 2400 and 3200 mg NaCl kg −1 soil) conditions on pistachio 'Badami' seedlings. The concentrations of potassium, calcium, sodium, magnesium, and Zn were determined by atomic absorption spectroscopy, and chloride was measured by titration Specific absorption rates (SAR) and specific utilization rates (SUR) of the minerals were calculated. Abscisic acid (ABA), 3-indoleacetic acid (IAA) and cytokinin contents were measured by HPLC, and the concentrations of osmoregulators (proline, glycine betaine and choline) were determined by spectrophotometry Results and discussion. The K, Ca and Zn concentrations and the IAA and cytokinin contents were reduced under Zn deficiency and salt stress. Increasing salinity in soil under Zn-deficient conditions generally decreased the SAR and SUR of K, Ca, Zn and Mg and ABA contents. However, these adverse effects of salinity were alleviated by increasing Zn levels up to 10 mg kg −1 soil. The addition of Zn to the soil significantly decreased the proline and choline concentrations and increased the glycine betaine one of the pistachio seedlings exposed to salinity. Zinc treatments influenced the relationship between the relative growth rate (RGR) and the studied elements SARs and SURs. Conclusion. Overall, Zn improved plant growth under salt stress. According to the results obtained in this study, adequate Zn treatments can prevent the uptake and accumulation of sodium in the pistachio leaf and stem and improve both plant RGR and mineral nutrients absorption. Adequate Zn treatments also contribute to maintain the balance among seedling phytohormones even under salinity stress.Keywords: Iran / pistachio / Pistacia vera / osmoregulation / phytohormone / growth rate / specific absorption rate / specific utilization rate Résumé -Efficacité du zinc contre le stress salin sur semis de pistachier. Introduction. La carence Zinc (Zn) est un trouble nutritionnel commun des pistachiers (Pistacia vera) cultivés en sols calcaires, salins et sodiques. Les effets d'une fertilisation en Zn sur l'absorption des nutriments minéraux, sur l'osmorégulation et sur la dynamique des phytohormones du pistachier soumis au stress salin ont été étudiés dans des conditions couramment rencontrées en Iran. Matériel et méthodes. L'étude a été menée sous serre pour évaluer les effets positifs du zinc (0, 5, 10 et 20 mg Zn kg −1 de sol) sur la croissance des jeunes plants de pistachier cv. Badami en conditions de stress salin liées à une solution saline (800, 1600, 2400 ou 3200 mg NaCl kg Conclusion. Dans l'ensemble...

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Hormones from roots as signals for the shoots of stressed plants

Cited by 167 publications

References 35 publications

Survival of Pseudomonas extremorientalis TSAU20 and P. chlororaphis TSAU13 in the rhizosphere of common bean (Phaseolus vulgaris) under saline conditions

Survival of Pseudomonas extremorientalis TSAU20 and P. chlororaphis TSAU13 in the rhizosphere of common bean (Phaseolus vulgaris) under saline conditions

Mechanisms and ecological implications of plant‐mediated interactions between belowground and aboveground insect herbivores

The effectiveness of zinc in alleviating salinity stress on pistachio seedlings

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