Effects of Water Stress on Growth Traits of Maize Seedling

2019 ◽  
Vol 09 (06) ◽  
pp. 474-481
Author(s):  
琼 高
Keyword(s):  
Water Stress ◽  
Growth Traits ◽  
Maize Seedling

Germination and seedling growth of five tree species from tropical dry forest in relation to water stress: impact of seed size

2004 ◽  
Vol 20 (4) ◽  
pp. 385-396 ◽  
Author(s):  
Ekta Khurana ◽  
J. S. Singh
Keyword(s):  
Water Stress ◽  
Leaf Area ◽  
Seed Size ◽  
Seedling Growth ◽  
Tree Species ◽  
Growth Traits ◽  
Tropical Dry Forest ◽  
Dry Forest ◽  
Terminalia Arjuna ◽  
The Impact

The impact of seed size on germination and seedling growth, as affected by water stress, was studied for five tree species from tropical dry forest of India, viz. Albizia procera, Acacia nilotica, Phyllanthus emblica, Terminalia arjuna and Terminalia chebula. Germination tests were conducted under five osmotic potential levels. Seedlings from large (LS) and small (SS) seeds were grown at four soil moisture levels. Observations were made on height, leaf area, biomass and other growth traits such as relative growth rate (RGR), net assimilation rate (NAR), specific leaf area (SLA), and root:shoot (R:S) ratio. Seeds of pioneer species and large seeds, within species, germinated earlier, and with increasing water stress, per cent germination and germination velocity declined. RGR was inversely related with drought tolerance. R:S ratio increased, RGR and SLA declined, but NAR increased with water stress. Notwithstanding successional status, the slow-growing species registered minimum reduction in biomass due to water stress. The response of LS and SS seedlings also differed for some of the growth variables. Increase in NAR could be a compensatory response to water stress, and the marked allocational plasticity could help maximize capture of the limited resource. Seedlings from smaller seeds, particularly of fast-growing species, would be able to cope with mild drought by morphogenetic and physiological plastic response in a better way than those from large seeds. However, seedlings from large seeds had greater survival than those from smaller seeds under intense water stress.

scholarly journals Biplot analysis of seed priming effects on maize seedling growth traits

2018 ◽  
Vol 55 (3) ◽  
pp. 111-117 ◽  
Author(s):  
Petar Čanak ◽  
Milan Mirosavljević ◽  
Miroslav Zorić ◽  
Mihajlo Ćirić ◽  
Bojana Vujošević ◽  
...  
Keyword(s):  
Seedling Growth ◽  
Growth Traits ◽  
Seed Priming ◽  
Maize Seedling ◽  
Priming Effects ◽  
Biplot Analysis

scholarly journals Assessment of Water Stress Tolerance in Mungbean Induced by Polyethyline Glycol

2019 ◽  
Author(s):  
Mohammad Rafiqul Islam ◽  
Mohammad Sohidul Islam ◽  
Bikash Chandra Sarker ◽  
Ashraful Alam ◽  
Masuma Akhter ◽  
...  
Keyword(s):  
Water Stress ◽  
Coefficient Of Variation ◽  
Crop Production ◽  
Growth Traits ◽  
Water Shortage ◽  
Mean Value ◽  
Water Stress Tolerance ◽  
Cluster Distance ◽  
Germination Vigor ◽  
Clustering Pattern

AbstractWater scarcity is a common hindrance of crop production in the globe especially in dry regions due to low precipitation along with high air temperature. Mungbean is a valuable pulse crop faced considerable amount of water shortage during its growing periods (March-May). Thus, the study was carried out to find out the variability and diversity present in the mungbean genotypes based on genetic variation of germination and seedling growth traits induced by polyethyline glycol (PEG-6000) stress (−0.7, −1, −2 and −4 bar). Seeds of each genotype was placed in a 9 cm diameter petridish containing sand bed that moistened by respective prepared PEG solutions and allowed to grow up to 10 days after placement. The result showed that the phenotypic coefficient of variation was significantly greater than the genotypic coefficient of variation for the entire studies traits, representing that these traits was influence by the environmental factors. The heritability showed moderate to high (24.26%-99.19%) under the observed traits indicating that these traits were under the control of additive genetic effects. The clustering pattern exhibited that cluster III were the largest ones with eleven genotypes. In case of contribution of different traits, the first five components were found to contribute for 98.19 % of the total variation while only first two components contributed for 82.12 % variation. The greater inter-cluster distance was found among the cluster I with II, III, IV and V. The maximum intra-cluster distance was observed in the cluster II (0.12). The genotypes in the cluster V recorded for greater performance by giving the highest mean value for germination, coefficient of germination, speed of germination, vigor index, shoot length and root length. This mean that genotype under cluster V have any gene or mechanism which responsible for tolerant higher level of water stress. The results of the study can be caring for establishing assortment criteria for water stress tolerant mungbean genotypes under breeding program.

scholarly journals Morphological and Physio-Biochemical Responses of Watermelon Grafted onto Rootstocks of Wild Watermelon [Citrullus colocynthis (L.) Schrad] and Commercial Interspecific Cucurbita Hybrid to Drought Stress

Horticulturae ◽  
2021 ◽  
Vol 7 (10) ◽  
pp. 359
Author(s):  
Mahdi Bikdeloo ◽  
Giuseppe Colla ◽  
Youssef Rouphael ◽  
Mohammad Reza Hassandokht ◽  
Forouzandeh Soltani ◽  
...  
Keyword(s):  
Water Stress ◽  
Growth Traits ◽  
Citrullus Lanatus ◽  
Water Status ◽  
Stress Conditions ◽  
Guaiacol Peroxidase ◽  
Citrullus Colocynthis ◽  
Apple Rootstock ◽  
Internodal Length ◽  
Biochemical Responses

This study aimed to assess the morphological and physio-biochemical responses of a commercial watermelon (Citrullus lanatus (Thunb.) Matsum. and Nakai) cv. ‘Crimson Sweet’ grafted onto a drought-tolerant rootstock of wild watermelon (bitter apple, Citrullus colocynthis (L.) Schrad, ‘Esfahan’) in comparison with an ungrafted ‘Crimson Sweet’ watermelon or one grafted onto a commercial interspecific Cucurbita hybrid (Cucurbita maxima Duch. × Cucurbita moschata Duch.) rootstock (‘Shintoza’) under water stress. The experiment was conducted in pots under a controlled environment in a greenhouse, and water stress was imposed by maintaining moisture level in pots at 100% (well water (WW)) or 50% (water deficit (WD)) of container capacity (CC). WD significantly decreased most of the morphological traits in ungrafted and grafted plants, while the decrease in growth traits was lower in grafted plants than ungrafted plants. The response of grafted plants onto wild watermelon rootstock (‘Esfahan’) for most of the affected parameters (shoot fresh and dry weight, vine length and internodal length) was, however, comparable to those grafted onto commercial Cucurbita hybrid rootstock (‘Shintoza’). Plants grafted onto bitter apple (wild watermelon) exhibited a relatively lower decrease in growth and biomass, besides showing higher antioxidant activity (e.g., guaiacol peroxidase) concomitant with the lower accumulation of malondialdehyde and electrolyte leakage in the leaf tissues in comparison with ungrafted plants. The overall growth performance, as well as those under water stress conditions in commercial rootstock-grafted watermelon, was related to its better plant water status (e.g., high relative water content) which was likely ascertained by its greater root efficiency. This suggests that watermelons grafted onto bitter apple rootstock and Cucurbita hybrid rootstock were constitutively more resistant to drought, with higher efficiency in mitigating oxidative stress than ungrafted treatment. The above findings demonstrated that bitter apple, a well-adapted desert species, can be used as an alternative rootstock to commercial rootstocks (e.g., ‘Shintoza’) for watermelon grafting under water stress conditions. In addition, bitter apple rootstock can be involved in rootstock breeding programs to improve drought tolerance in watermelon.

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