Plant Water Status

González, L. M.; Roger, Manuel Joaquín Reigosa

doi:10.1007/0-306-48057-3_12

Cited by 10 publications

(6 citation statements)

References 3 publications

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“…Our results are similar to Galmés et al (2007) and Lambers et al (2008). Elevated VPD equals increased demands in transpiration, which induce an extensive water loss by plants, a considerable reduction in available soil water and the establishment of intense water deficit in plant tissues (González and Reigosa, 2003;Chaves and Oliveira, 2004). The effect of elevated VPD on the water status of the three species studied was confirmed by the seasonal changes in both leaf water potential (Ψ) (Fig.…”

Section: Discussionsupporting

confidence: 86%

“…However, when water deficit became intense, B. inermis possibly resisted drought through physiological adjustments, which include changes in cell wall elasticity and osmotic adjustment. These mechanisms help stressed plants maintain leaf turgidity, even when RWC is quite low (Mamolos et al, 2001;González and Reigosa Roger, 2003;Pinheiro et al, 2004;Dong et al, 2011).…”

Section: Discussionmentioning

confidence: 99%

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Seasonal Changes in Leaf Tissue Rehydration of One Annual and Two Perennial Grass Forage Species Induced by Bioclimate

KAPSALI

Karatassiou

2015

Not Bot Horti Agrobo

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Bioclimate signifies the continuous interplay between plants and climate factors (primarily drought) and has a direct impact on the water relations and the duration of the rehydration process in water stressed plants. To explore the association between bioclimate and water physiology of forage species in semi-arid Mediterranean grasslands, we determined the seasonal variation in leaf water potential, turgid weight and relative water content in wild growing Dactylis glomerata L., Bromus inermis Leyss (perennial) and Bromus sterilis L. (annual) during the growing season. The study was conducted at the farm of the Aristotle University of Thessaloniki. The results of the current study reveal that B. sterilis maintained high levels of water potential most probably by accelerating its biological cycle and decreasing water content because it fails to sustain turgidity. Dactylis glomerata and B. inermis presented even higher water contents than B. sterilis for the same water potential. Dactylis glomerata exhibited substantially higher water potential and content than B. inermis by keeping the rehydration duration stable. The extensive creeping rhizome seems to allow B. inermis to sustain high values of water potential and content possibly ensuring turgidity. Regardless of the grass species the duration of rehydration ranged from 2.5 to 3.5 hours throughout the growing season. Our findings demonstrate that (a) D. glomerata and B. inermis are better adapted to Mediterranean semiarid conditions than B. sterilis and (b) turgid weight in Mediterranean forage species can safely be determined after a rehydration period of 3.5 hours.

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Section: Discussionsupporting

confidence: 86%

Section: Discussionmentioning

confidence: 99%

Seasonal Changes in Leaf Tissue Rehydration of One Annual and Two Perennial Grass Forage Species Induced by Bioclimate

KAPSALI

Karatassiou

2015

Not Bot Horti Agrobo

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“…After the fresh weight measurements, the samples were soaked in distilled water for 8 hours, and accordingly, saturated weights were recorded. Then, leaf relative water content was calculated according to the formula given by Gonzalez and Gonzalez, [ 42 ]: …”

Section: Methodsmentioning

confidence: 99%

Assessment of the genetic diversity and population structure of groundnut germplasm collections using phenotypic traits and SNP markers: Implications for drought tolerance breeding

et al. 2021

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Profiling the genetic composition and relationships among groundnut germplasm collections is essential for the breeding of new cultivars. The objectives of this study were to assess the genetic diversity and population structure among 100 improved groundnut genotypes using agronomic traits and high-density single nucleotide polymorphism (SNP) markers. The genotypes were evaluated for agronomic traits and drought tolerance at the International Crop Research Institute for the Semi-Arid Tropics (ICRISAT)/India across two seasons. Ninety-nine of the test genotypes were profiled with 16363 SNP markers. Pod yield per plant (PY), seed yield per plant (SY), and harvest index (HI) were significantly (p < 0.05) affected by genotype × environment interaction effects. Genotypes ICGV 07222, ICGV 06040, ICGV 01260, ICGV 15083, ICGV 10143, ICGV 03042, ICGV 06039, ICGV 14001, ICGV 11380, and ICGV 13200 ranked top in terms of pod yield under both drought-stressed and optimum conditions. PY exhibited a significant (p ≤ 0.05) correlation with SY, HI, and total biomass (TBM) under both test conditions. Based on the principal component (PC) analysis, PY, SY, HSW, shelling percentage (SHP), and HI were allocated in PC 1 and contributed to the maximum variability for yield under the two water regimes. Hence, selecting these traits could be successful for screening groundnut genotypes under drought-stressed and optimum conditions. The model-based population structure analysis grouped the studied genotypes into three sub-populations. Dendrogram for phenotypic and genotypic also grouped the studied 99 genotypes into three heterogeneous clusters. Analysis of molecular variance revealed that 98% of the total genetic variation was attributed to individuals, while only 2% of the total variance was due to variation among the subspecies. The genetic distance between the Spanish bunch and Virginia bunch types ranged from 0.11 to 0.52. The genotypes ICGV 13189, ICGV 95111, ICGV 14421, and ICGV 171007 were selected for further breeding based on their wide genetic divergence. Data presented in this study will guide groundnut cultivar development emphasizing economic traits and adaptation to water-limited agro-ecologies, including in Ethiopia.

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“…Relative water loss is considered as one of the most appropriate measures of plant’s water status in response to adverse condition [ 38 ]. Present study showed that PgGPx overexpressing plants have the capacity to maintain higher water level in comparison to WT under Cd 2+ stress ( Fig 2E ).…”

Section: Resultsmentioning

confidence: 99%

Evaluation of Cd2+ stress tolerance in transgenic rice overexpressing PgGPx gene that maintains cellular ion and reactive oxygen species homeostasis

Islam

Reddy

2022

PLoS ONE

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Non-essential toxic heavy metal like cadmium (Cd2+) interferes with the plant growth and development in many ways. Cd2+ travels via plant transportation system, specifically through xylem and may integrate into the food chain causing unfavorable condition in human health. Therefore, strategies to develop Cd2+ tolerance and less accumulation in the plant system require urgent attention. Peroxidase gene family is known for metal ions transportation including Cd2+ and thus plays an important role in ion homeostasis. Previously, we have reported the presence of a Cd2+ dependent functional peroxiredoxin from Pennisetum glaucum (PgGPx). The present study elucidates the role of this PgGPx against Cd2+ stress in rice. The transcript levels of PgGPx were found to be highly upregulated in response to exogenous Cd2+. Moreover, recombinant PgGPx protein showed significant glutathione S-transferase activity in vitro. Ectopically expressed PgGPx in transgenic rice plants showed tolerance towards Cd2+ stress as demonstrated by several physiological indices including shoot and root length, biomass, chlorophyll, and hydrogen peroxide content. Moreover, these transgenic plants also showed enhanced capability to cope up with oxidative stress by enhancing the activity of different antioxidant enzymes including Superoxide dismutase, Catalase, Ascorbate peroxidase, Glutathione peroxidase, Glutathione reductase) in response to Cd2+. Hence, maintenance of cellular ion homeostasis and modulation of reactive oxygen species-scavenging pathway are found to be improved by overexpression of PgGPx under Cd2+ stress. These results will pave the way to develop strategies for engineering Cd2+ stress tolerance in economically important crop plants.

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Plant Water Status

Cited by 10 publications

References 3 publications

Seasonal Changes in Leaf Tissue Rehydration of One Annual and Two Perennial Grass Forage Species Induced by Bioclimate

Seasonal Changes in Leaf Tissue Rehydration of One Annual and Two Perennial Grass Forage Species Induced by Bioclimate

Assessment of the genetic diversity and population structure of groundnut germplasm collections using phenotypic traits and SNP markers: Implications for drought tolerance breeding

Evaluation of Cd2+ stress tolerance in transgenic rice overexpressing PgGPx gene that maintains cellular ion and reactive oxygen species homeostasis

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