Root growth pattern in finger millet under well-watered and drought stress condition: Its relation to shoot mass production

2021 ◽  
Author(s):  
S. Sanjeev Krishna ◽  
Y. A. Nanja Reddy
Keyword(s):  
Drought Stress ◽  
Root Growth ◽  
Growth Pattern ◽  
Mass Production ◽  
Finger Millet ◽  
Stress Condition ◽  
Drought Stress Condition ◽  
Shoot Mass

scholarly journals Influence of exogenous polyamines on antioxidant defence and essential oil production in valerian (Valeriana officinalis L.) plants under drought stress

2016 ◽  
Vol 107 (1) ◽  
pp. 81 ◽  
Author(s):  
Seyed Hamid MUSTAFAVI ◽  
Fariborz SHEKARI ◽  
Hamid Hatami MALEKI
Keyword(s):  
Drought Stress ◽  
Essential Oil ◽  
Root Growth ◽  
Stress Condition ◽  
Foliar Application ◽  
Valeriana Officinalis ◽  
Antioxidant Defence ◽  
Moderate Drought ◽  
Drought Stress Condition ◽  
Essential Oil Production

The objective of this study was to determine the effects of foliar application of polyamines (PAs) on antioxidant defence and essential oil production of valerian (<em>Valeriana officinalis</em> L.) grown under different drought stress treatments (100, 70, 50 and 30% available water content). This study was carried out using pots in greenhouse condition. Drought–stressed valerian seedlings were sprayed with 1 mM concentration of each putrescine (Put), spermidine (Spd) and spermine (Spm). The results showed that drought stress significantly affected most biochemical characteristics of valerian plants. Characteristics including leaf relative water content, chlorophyll a and b contents were decreased, while carotenoids and electrolyte leakage were increased with the increase of water stress. In this research, defensive characteristics comprising proline content, soluble sugars, catalase, and ascorbate peroxidase were increased followed by drought stress to ameliorate the adverse effect of it.  Results revealed that foliar application of Spd and Spm provoked the antioxidant enzymes activity as well as proline accumulation in valerian which alleviate the membrane damages. Consequently, Spd and Spm increased photosynthetic pigments which act as energy supply for plant growth and production. Here, putrescine had detrimental effects on CAT activity and Chl a content. Albeit, PAs presented remarkable effects under moderate drought stress condition but it showed reverse trends in severe drought stress condition.  In terms of quantity and quality yield, drought stress reduced root growth but increased the concentration of essential oils. PAs are able to alleviate water deficit-induced diminish root growth. These results suggest that in moderate drought stress, growers can use PAs to increase productivity valerian.

scholarly journals Response of some upland rice varieties to drought stress

2017 ◽  
Vol 1 (2) ◽  
pp. 69-77
Author(s):  
EDI PURWANTO ◽  
SAMANHUDI SAMANHUDI ◽  
YONIAR EFFENDI
Keyword(s):  
Drought Stress ◽  
Stress Condition ◽  
Upland Rice ◽  
Rice Variety ◽  
Dry Weight ◽  
Grain Weight ◽  
Rice Varieties ◽  
Resistance Level ◽  
Drought Stress Condition ◽  
Four Levels

Purwanto E, Samanhudi, Yoniar Effendi Y. 2017. Response of some upland rice varieties to drought stress. Trop Drylands 1: 69-77. The study aimed to examine the response of upland rice varieties at germination stage on several PEG (Polyethylene Glycol) 6000 concentration levels and to determine growth characteristics, physiological changes and yield of upland rice varieties under drought stress condition in a pot experiment. The study consisted of two experiments; the first was to study germination and early growth, and the second was to study the vegetative and generative growth of upland rice under drought stress condition. Experiments I and II were conducted in a completely randomized factorial design consisted of two factors and three replications. In experiments I, the first factor was upland rice variety comprised of 10 varieties and the second factor was PEG concentration consisted of four levels. In experiment II, the first factor was upland rice varieties that responded the best to drought stress in experiment I, and the second factor was the drought stress treatment consisted of moisture content at 100, 75, 50 and 25% field capacity. The research was conducted at the Laboratory of Plant Physiology and Biotechnology and the greenhouse of Faculty of Agriculture, Sebelas Maret University (UNS) Surakarta. The results showed that the germination and vigor index decreased with increasing levels of PEG concentration. PEG concentration of 25 g L-1 of water was the most optimum for screening drought resistant upland rice. In experiment I, Towuti, Situ Patengang, Kalimutu and Gajah Mungkur varieties showed the best response to drought stress. Increased intensity of drought stress resulted in a reduction of plant height, number of tillers, dry weight, relative growth rate, leaf area, number of grains hill-1, 1000 grain weight, dry grain weight hill-1 and root dry weight. The drought stress also caused an earlier flowering date and increased percentage of empty grain. Based on the dry grain weight hill-1, Towuti exhibited a higher drought resistance level than Gajah Mungkur, Situ Patenggang and Kalimutu.

scholarly journals Determination of the best indirect selection criteria in Iranian durum wheat (Triticum aestivum L.) genotypes under irrigated and drought stress conditions

Genetika ◽  
2015 ◽  
Vol 47 (2) ◽  
pp. 549-558 ◽  
Author(s):  
Ahmad Golparvar ◽  
Mohammad Gheisari ◽  
Davoud Naderi ◽  
Ali Mehrabi ◽  
Amin Hadipanah ◽  
...  
Keyword(s):  
Drought Stress ◽  
Durum Wheat ◽  
Total Variation ◽  
Seed Yield ◽  
Stress Condition ◽  
Spike Density ◽  
Plant Seed ◽  
Wheat Genotypes ◽  
Drought Stress Condition ◽  
Yield Factor

In order to evaluate and classify morphological and morpho-physiological traits of durum wheat genotypes in drought and irrigated conditions 200 durum wheat genotypes were sown in modify augmented design with four replications during 2013- 2014 farming season. Two replications were considered as drought condition and two as irrigated. Factor analysis based on principal component analysis method and varimax rotation indicated that four important factors accounted for about 87 and 92 percent of the total variation among traits in drought and irrigated conditions, respectively. In drought stress condition, the first factor assigned 37 percent of total variation between traits and was significantly related with spike yield and it?s components. Therefore, this factor was regarded as spike seed yield factor. Other factors in drought stress condition accounted for 22, 16 and 12 percent of variation between traits and were entitled as plant seed yield, spike density and assimilate transmission factors, respectively. In irrigated condition, the first factor assigned 36 percent of total variation between traits and was significantly related with traits plant and spike seed yield, plant and spike harvest index, No. seed/spike and plant height. This factor was regarded as plant seed yield factor. Other factors in irrigated condition accounted for 24, 18 and 14 percent of variation between traits and were entitled as production, assimilate transmission and spike density factors, respectively. Overall, results revealed effect of different environments on extracted factors, percent of variation accounted for by factors and traits related with each factor.

scholarly journals Effects of drought stress on shoot development of tomato (Solanum lycopersicum L.)

2021 ◽  
Vol 5 (2) ◽  
pp. 1208-1215
Author(s):  
Tuan Minh Nguy ◽  
Thang Thanh Tran ◽  
Huong Thanh Tran
Keyword(s):  
Drought Stress ◽  
Stress Tolerance ◽  
Leaf Area ◽  
Stress Condition ◽  
Carotenoid Content ◽  
Shoot Height ◽  
Drought Stress Tolerance ◽  
Drought Stress Condition ◽  
Number Of Leaves ◽  
Effects Of Drought

In recent years, drought stress was strongly affected on the development and yield of tomatoes. There are increasing interests in the study of physiological transformations in adaption to stress in plants In this study, effects of drought stress (mannitol at different concentration) on the development of tomato shoot were studied. Morphological and physiological changes during the development of shoot under drought stress conditions were analyzed. Based on the analysis results, the combination of cytokinin and gibberellin was treated to increase the drought stress tolerance of plants. Results showed that mannitol at 20 g/L induced tomato drought stress. Shoot height, number of leaves, leaf area, and the number of roots significantly decreased in the drought stress condition compared to the control. The formation superoxide (O2-) and hydrogen peroxide (H2O2) occurred in the meristem, elongation region and cap of the roots in the drought stress condition instead of only cap root in the control. In the drought stress condition, there was an increase in respiration intensity, proline and carotenoid content, and abscisic acid activity. In contrast, the content of chlorophyll, photosynthesis intensity, cytokinin and gibberellin activity decreased in comparison with the control. The combination treatment of zeatin 0.5 mg/L and GA3 0.5 mg/L improved the drought stress tolerance of plants. The shoot height, number of leaves, leaf area and number of roots of the treated plants were higher than those of the control plants.

LED light mediates phenolic accumulation and enhances antioxidant activity in Melissa officinalis L. under drought stress condition

PROTOPLASMA ◽  
2020 ◽  
Vol 257 (4) ◽  
pp. 1231-1242 ◽  
Author(s):  
Tayebeh Ahmadi ◽  
Leila Shabani ◽  
Mohammad R. Sabzalian
Keyword(s):  
Antioxidant Activity ◽  
Drought Stress ◽  
Stress Condition ◽  
Melissa Officinalis ◽  
Led Light ◽  
Drought Stress Condition

Effects of mycorrhizal symbiosis and seed priming on yield and water use efficiency of sesame under drought stress condition

2019 ◽  
Vol 257 ◽  
pp. 108749 ◽  
Author(s):  
Abdolhossein Askari ◽  
Mohammad Reza Ardakani ◽  
Farzad Paknejad ◽  
Yaaghoob Hosseini
Keyword(s):  
Drought Stress ◽  
Water Use Efficiency ◽  
Water Use ◽  
Stress Condition ◽  
Seed Priming ◽  
Mycorrhizal Symbiosis ◽  
Drought Stress Condition ◽  
Use Efficiency

scholarly journals Selection of various synthetic Maize (Zea mays L.) genotypes on drought stress condition

2019 ◽  
Vol 235 ◽  
pp. 012027
Author(s):  
M Farid ◽  
Y Musa ◽  
Nasaruddin ◽  
I Ridwan
Keyword(s):  
Zea Mays ◽  
Drought Stress ◽  
Stress Condition ◽  
Zea Mays L ◽  
Drought Stress Condition ◽  
Selection Of
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