Soluble sugars and proline accumulation play a role as effective indices for drought tolerance screening in Persian walnut (<i>Juglans regia</i>L.) during germination

Lotfi, Naser; Vahdati, Kourosh; Kholdebarin, Bahman; Amiri, Rahebeh

doi:10.1051/fruits/20010005

Cited by 70 publications

(30 citation statements)

References 48 publications

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“…Similar with some previous studies (Vaz et al 2010), the soluble sugars increased significantly with drought stress, but the increased starch concentration was different from other studies (Naser et al 2010;Silva et al 2010). Gebauer et al (1998) suggested that strong positive correlations exist between soluble sugar and TP concentrations and between starch and condensed tannins concentrations, respectively.…”

Section: Discussionsupporting

confidence: 48%

Effects of fertilization and drought stress on tannin biosynthesis of Casuarina equisetifolia seedlings branchlets

Zhang

Shao

Ye³

et al. 2012

Acta Physiol Plant

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Nutrient, water, and their interactions influence the allocation of investment by plants to resistance and tolerance traits. We used a completely crossed randomizedblock design experiment to examine the independent and interactive effects of nutrients and water availability on tannin production of C. equisetifolia seedlings. The results showed that nitrogen and phosphorus fertilizer have significant effects on total phenolics (TP) and extractable condensed tannins (ECT) concentrations of branchlets. TP and ECT concentrations decreased with fertilizer addition and increased in arid condition. This pattern lends to support source-sink hypothesis such as the carbon-nutrient balance (CNB) hypothesis and the growth-differentiation balance (GDB) hypothesis. Soluble sugars or starch concentrations were both inversely related to TP concentrations. However, there was no significant correlation between them and ECT concentrations. In addition, chlorophyll concentration had a positive linear correlation with TP and no significant correlation with ECT. On the contrary, chlorophyll a/b ratios were negatively correlated with TP and positively correlated with ECT. The discrepancy of relationship between carbohydrates and TP or ECT showed that the biosynthetic routes of different tannins were different. In this study, no significant correlation between TP and N, or ECT and N, did not support protein competition model (PCM). TP:N and ECT:N ratios were higher in nutrient deficiency and arid conditions, which were one of the important nutrient conservation strategies for C. equisetifolia.

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Section: Discussionsupporting

confidence: 48%

Effects of fertilization and drought stress on tannin biosynthesis of Casuarina equisetifolia seedlings branchlets

Zhang

Shao

Ye³

et al. 2012

Acta Physiol Plant

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“…Despite the changes as mentioned above, no significant differences were observed in fruit yield in this study, in agreement with the report of Andersen [24], according to which root pruning had little effect on fruit set, fruit size and yield. The experimental data also demonstrated that root pruning increased total sugar content in fruit, beneficial for desiccation tolerance [25], and fruit quality was the best in the third fruiting year.…”

Section: Shou-jun Yang Et Almentioning

confidence: 71%

Effect of root pruning on competitive ability in Chinese jujube tree

Yang¹,

Du²,

Yu³

et al. 2012

Fruits

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-Introduction. The Chinese jujube tree always presents some unfavorable performances because its vegetative growth is very vigorous. Our study was conducted to apply root pruning to test whether it can effectively inhibit the vigorous vegetative growth by regulating the competitive ability of the root system for water and nutrients. Materials and methods. For our experiment, roots were cut at three different distances from the trunk (light, moderate and severe root pruning) on both inter-row sides of jujube trees to the depth of 20 cm. Roots of control jujube trees were not pruned. Then we determined for three years the competitive indicators of Chinese jujube trees including the length, number and thickness of primary branches; photosynthetic characteristics and nutrient concentrations of leaves; hormone contents in the jujube head, flower number and fruiting percentage, yield, and fruit quality. Results and discussion. In the early stage after root treatment, root pruning decreased lots of indicators such as concentrations of nitrogen, phosphorus, and potassium in leaves, photosynthesis, transpiration, stomatal conductance, and intercellular CO 2 concentration of leaves, relative to the same indicators as the control group. With the gradual emergence of new roots, these indexes appeared to have adverse patterns with respect to those in the early stage after root pruning. Compared with the control, root pruning significantly decreased the length and number of primary branches and flower number, but thickened primary branches, enhanced fruiting percentage and increased the amount of ethylene release of the jujube head in the whole experiment. Fruit quality was improved with root pruning, as indicated by increases in vitamin C and total sugar and a decrease in titrable acidity. No effects of root pruning were noticed on yield. From our results, we conclude that the removal of the root system at a distance of three times the trunk diameter (severe pruning) from the trunk is the most effective in regulating the competitive ability of the Chinese jujube tree.China / Ziziphus / root pruning / plant response / performance testing / agronomic characters / fruits / quality Effet de la taille des racines sur les performances du jujubier chinois.Résumé -Introduction. Le jujubier chinois présente toujours certaines performances désavantageuses du fait de sa croissance végétative très vigoureuse. Notre étude a été menée pour tester la taille des racines afin de vérifier si elle peut freiner efficacement la croissance végétative en régulant la compétitivité du système racinaire pour l'eau et les nutriments. Matériel et méthodes. Pour notre expérimentation, les racines de jujubiers chinois ont été coupées à trois distances différentes à partir du tronc (taille légère, modérée et sévère des racines), de chaque côté entre les rangs de jujubiers, à 20 cm de profondeur. Les racines des jujubiers témoins n'ont pas été taillées. Nous avons ensuite suivi pendant trois années certains indicateurs de compétitivité du jujubier...

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“…Proline accumulation may be only a symptom of stress rather than an adaptive trait Zunzunegui et al 2005). Proline can be used as a water stress indicator in Mediterranean species (Lansac et al 1994), and it has been suggested to be an evaluating parameter for selecting drought-resistant plants (Naser et al 2010).…”

Section: Environmental Effect On Proline and Phytohormonesmentioning

confidence: 99%

Aridity promotes differences in proline and phytohormone levels in Pinus pinaster populations from contrasting environments

Corcuera¹,

Gil‐Pelegrín²,

Notivol³

2011

Trees

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We analysed proline, abscisic acid, (ABA), jasmonic acid (JA), indole acetic acid (IAA) and salicylic acid (SA) accumulation after summer drought at two Pinus pinaster provenance-progeny trial sites. The aim of the study was to evaluate P. pinaster phenotypic plasticity and intraspecific variation in the endogenous concentrations of these metabolites and to determine the best stress indicators for family and population discrimination. The environmental effect was remarkable, as striking differences between the sites were obtained for all indicators except for SA, which was unaffected by the environmental conditions. The levels of proline, ABA and IAA were higher in the xeric than in the mesic site. In contrast, JA was higher in the mesic site. The higher variation displayed at the family level led to family differences for all parameters and sites. Differences in proline and ABA between populations were exclusively found in the xeric site, where the population from the wet climate showed higher accumulation. This study provides evidence for differentiation among P. pinaster populations and families in their plastic responses to drought and highlights the importance of considering intraspecific variability when evaluating biochemical stress indicators in environmental studies.

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Soluble sugars and proline accumulation play a role as effective indices for drought tolerance screening in Persian walnut (Juglans regiaL.) during germination

Cited by 70 publications

References 48 publications

Effects of fertilization and drought stress on tannin biosynthesis of Casuarina equisetifolia seedlings branchlets

Effects of fertilization and drought stress on tannin biosynthesis of Casuarina equisetifolia seedlings branchlets

Effect of root pruning on competitive ability in Chinese jujube tree

Aridity promotes differences in proline and phytohormone levels in Pinus pinaster populations from contrasting environments

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