Plant Biomass Productivity Under Abiotic Stresses in SAT Agriculture

Krishnamurthy, L.; Zaman-Allah, Mainassara; Ramamoorthy, P.; Ahmed, M. Irshad; Vadez, Vincent

doi:10.5772/17279

Cited by 12 publications

(6 citation statements)

References 64 publications

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“…Although high salinity is known to impact its growth and productivity in several arid zones (Krishnamurthy et al 2007). An average reduction of ~ 3-4 folds in shoot biomass productivity and grain yield was reported in 15 accessions of pearl millet (Krishnamurthy et al 2011). In another study, 11 pearl millet lines showed a significant reduction of 19.1% and 41.3% in biomass and grain yield, respectively under salinity (Toderich et al 2018).…”

Section: Introductionmentioning

confidence: 91%

Evaluation of Multiple Salinity Tolerance Indices for Screening and Comparative Biochemical and Molecular Analysis of Pearl Millet [Pennisetum glaucum (L.) R. Br.] Genotypes

Jha

Singh

Chouhan

et al. 2021

J Plant Growth Regul

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Salinity is a major constraint for plant growth, development and yield worldwide. Evaluation of a large number of germplasms in salt-stressed environments may help identify superior salt-tolerant genotypes. The present study dissects the genetic diversity of 33 pearl millet genotypes (landraces and inbred lines) for salinity tolerance through in vitro screening at the seedling stage. Our results revealed a significant reduction in total biomass and shoot growth of the salt-sensitive genotypes upon exposure to 150 mM NaCl, in contrast to the tolerant genotypes showing better growth characteristics. A significant differential effect of salt treatment on morphological traits was observed by analysis of variance (ANOVA), confirming substantial genetic diversity among all genotypes for salt tolerance. The genotypes were clustered into three groups based on multiple stress indices. The genotypes were also evaluated using principal component analysis (PCA) to identify the key contributing traits for stress tolerance. Based on these results, a total of four contrasting genotypes were selected for further biochemical and molecular analysis. Physiological studies confirmed that salt tolerance might be due to the higher content of osmolytes and the activity of antioxidant enzymes. Similarly, gene expression profiling of catalase (CAT), glutamate dehydrogenase (GDH), glutathione reductase (GR), and nitrate reductase (NR) revealed a profound increase in NR and GDH transcript levels in the tolerant genotypes, suggesting their major role as reactive oxygen species (ROS) scavengers under salinity. The overall findings of this study could be utilized further for candidate gene mining through "omics" approaches, aiming toward development of salinity resilient crop plants.

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Section: Introductionmentioning

confidence: 91%

Evaluation of Multiple Salinity Tolerance Indices for Screening and Comparative Biochemical and Molecular Analysis of Pearl Millet [Pennisetum glaucum (L.) R. Br.] Genotypes

Jha

Singh

Chouhan

et al. 2021

J Plant Growth Regul

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“…Growth rate is an important indicator to evaluate plant adaptability and resistance (Krishnamurthy et al 2011). For this, the dry weight of S. polyrhiza in each treatment was measured after 7 days of cultivation to determine its growth rate ( Table 2).…”

Section: Growth Carbon and Energy Fixation Ratesmentioning

confidence: 99%

Carbon and energy fixation of great duckweed Spirodela polyrhiza growing in swine wastewater

Wang

Yang

Tang

et al. 2015

Environ Sci Pollut Res

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The ability to fix carbon and energy in swine wastewater of duckweeds was investigated using Spirodela polyrhiza as the model species. Cultures of S. polyrhiza were grown in dilutions of both original swine wastewater (OSW) and anaerobic digestion effluent (ADE) based on total ammonia nitrogen (TAN). Results showed that elevated concentrations of TAN caused decreased growth, carbon fixation, and energy production rates, particularly just after the first rise in two types of swine wastewater. Also, OSW was more suitable for S. polyrhiza cultivation than ADE. Maximum carbon and energy fixation were achieved at OSW-TAN concentrations of 12.08 and 13.07 mg L(-1), respectively. Photosynthetic activity of S. polyrhiza could be inhibited by both nutrient stress (in high-concentration wastewater) and nutrient limitation (in low-concentration wastewater), affecting its growth and ability for carbon-energy fixation.

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“…Thus, according to UNICEF (2012) reports currently 36 countries are facing extreme water shortage. 1 Arid and semi-arid regions are commonly located in India, in Southeast Asia, sub-Saharan Africa, much of the Southern and Eastern Africa and a few locations in Latin America 2 ( Figure 1 ). However, arid and semi-arid areas are increasing rapidly especially in the developing nations of the world and are common in the whole tropical Mediterranean.…”

Section: Introductionmentioning

confidence: 99%

Socio-Environmental Determinants and Human Health Exposures in Arid and Semi-Arid Zones of Iran—Narrative Review

Kalankesh

Rodríguez‐Couto

Alami

et al. 2022

Environ�Health�Insights

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Lifestyle is different in arid and semi-arid zones. However, where people are born and live have a lasting influence on their social and environmental exposure. This review focuses on the, various dimensions of environmental health imbalance inequality especially in significant environmental sources such as (ie, air, water, soil) among provinces that creates a big health gap in the center, East and the Southeast of Iran. Thus, the population of the arid and semi-arid zones of Iran is facing respiratory, cardiovascular, cancer and infection diseases linked to environmental problems such as chemical and microbial pollution due to air pollution and unsafe water sources, respectively. The prevalence of certain types of cancer such as skin, stomach, bladder, prostate and colorectal cancer together with some respiratory and cardiovascular diseases in arid and semiarid zones such as Kerman, Yazd, etc., has been reported in comparison with other provinces frequently. These impacts have effects on multiple levels of health security in those zones. Based on these concerns, we propose key questions that should guide research in the context of the socio environmental science to support science-based management actions in Iran and other similar semi-arid areas worldwide.

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Plant Biomass Productivity Under Abiotic Stresses in SAT Agriculture

Cited by 12 publications

References 64 publications

Evaluation of Multiple Salinity Tolerance Indices for Screening and Comparative Biochemical and Molecular Analysis of Pearl Millet [Pennisetum glaucum (L.) R. Br.] Genotypes

Evaluation of Multiple Salinity Tolerance Indices for Screening and Comparative Biochemical and Molecular Analysis of Pearl Millet [Pennisetum glaucum (L.) R. Br.] Genotypes

Carbon and energy fixation of great duckweed Spirodela polyrhiza growing in swine wastewater

Socio-Environmental Determinants and Human Health Exposures in Arid and Semi-Arid Zones of Iran—Narrative Review

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