scholarly journals The Effect of Calcium Chloride on Drought Tolerance of Mulberry

2020 ◽  
pp. 177-186
Author(s):  
Cha JinMyong ◽  
Ri CholUk ◽  
Kim Chol Min ◽  
Ri Huang Gi ◽  
Ri Do Hun Qin Bo
Keyword(s):  
Drought Tolerance ◽  
Calcium Chloride ◽  
Treated Group ◽  
Severe Drought ◽  
Drought Condition ◽  
Effective Measure ◽  
Biochemical Responses ◽  
Cacl2 Concentration ◽  
Silkworm Cocoon ◽  
Physiological And Biochemical

Drought stress greatly affects the quality and yield of mulberry leaves, which eventually influences the production of silkworm cocoon. In this study, the effect of calcium chloride on drought tolerance of mulberry was investigated. Different concentrations of CaCl2 solutions were sprayed on the leaves of mulberry under drought condition, and the physiological and biochemical responses were measured. As a result, the spray of CaCl2 on leaves (CaCl2-spray-on-leaves) was proved to have gradual increases in measure parameters as compared to CaCl2-untreated case under the same drought condition; furthermore, 20mM CaCl2-treated group showed a significant increase (P<0.05), which indicates the optimal CaCl2 concentration for improving the drought tolerance of mulberry. This study demonstrated that CaCl2-spray-on-leaves can be an effective measure to ameliorate the drought tolerance of mulberry in the severe-drought areas.

scholarly journals Physiological and biochemical responses to severe drought stress of nine Eucalyptus globulus clones: a multivariate approach

2014 ◽  
Vol 34 (7) ◽  
pp. 778-786 ◽  
Author(s):  
V. Granda ◽  
C. Delatorre ◽  
C. Cuesta ◽  
M. L. Centeno ◽  
B. Fernandez ◽  
...  
Keyword(s):  
Drought Stress ◽  
Eucalyptus Globulus ◽  
Severe Drought ◽  
Multivariate Approach ◽  
Biochemical Responses ◽  
Physiological And Biochemical

scholarly journals Physiological and biochemical responses at leaf and root levels in two Acacia species (A. cyclops and A. salicina) subjected to dehydration

2021 ◽  
Vol 49 (1) ◽  
pp. 11934
Author(s):  
Samira SOUDEN ◽  
Mustapha ENNAJEH ◽  
Habib KHEMIRA
Keyword(s):  
Water Stress ◽  
Arid Regions ◽  
Severe Drought ◽  
Acacia Species ◽  
Biochemical Responses ◽  
Southern Tunisia ◽  
Severe Water Stress ◽  
Leaves And Roots ◽  
Physiological And Biochemical ◽  
Selection Of

To set-up afforestation and reforestation projects in arid regions southern Tunisia, several indigenous and exotic forest species were used among them are Acacia spp. However, the success of these projects remains highly sceptical because of the intensified aridity during the last decade. To overcome this issue, the selection of genotypes resistant to severe drought is crucial as first step. For this reason, the aim of the present study is to compare tolerance capacity to severe drought between two Acacia species (A. cyclops and A. salicina) and evaluate efficacy of their biochemical responses at leaf and root levels. Combined physiological and biochemical approaches were adopted. Two-years-old plants of two Acacia species (A. cyclops and A. salicina), frequently used in forestation projects in arid regions southern Tunisia, were subjected to severe water stress by withholding watering during 60 days. At regular intervals, water relations and net photosynthetic rate (Pn) were measured. In addition, the biochemical response was characterized by quantifying one sugar alcohol (arabitol) and three cyclitols (myo-inositol, pinitol and quercitol) in leaves and roots. Our results revealed that A. cyclops was more tolerant to severe drought than A. salicina. The turgor of its leaf tissues and its Pn were less affected. The superiority of A. cyclops to tolerate severe water stress might be attributed to greater efficiency of its biochemical defense mechanisms compared to A. salicina. Comparison of biochemical profiles between species exhibited some differences depending on the organs and the species. For development and survival under severe drought conditions, A. cyclops accomplished efficient osmoregualation and osmoprotection mechanisms by massive accumulation of specific polyols distinctly in leaves and roots. Indeed, compared to A. salicina, A. cyclops accumulated higher amount of arabitol, myo-inositol and quercitol in roots, but pinitol in leaves. So, contents of these polyols might be used as promising criteria for the selection of drought-tolerant Acacia species. 

scholarly journals Early Maturing Drought Tolerant Rice Variety BRRI dhan71 Suitable for Drought Prone Environment in Bangladesh

2020 ◽  
pp. 1-11
Author(s):  
Md. Abdul Kader ◽  
Tamal Lata Aditya ◽  
Ratna Rani Majumder ◽  
Tapas Kumer Hore ◽  
Md. Ehsanul Haq
Keyword(s):  
Drought Tolerance ◽  
Grain Yield ◽  
Amylose Content ◽  
Rice Variety ◽  
Standard Condition ◽  
Reproductive Stage ◽  
Severe Drought ◽  
Drought Condition ◽  
Drought Tolerant ◽  
Early Maturing

Drought is the second most treacherous climate-related risk for rice production in rainfed lowland areas. To counter this climate vulnerability, a new rice variety with enhanced drought tolerance was developed. The promising line IR82589-B-B-84-3 was subjected to advanced yield trials to evaluate specific and general adaptability with standard check in on-station as well as on-farm conditions of Bangladesh following randomized complete block (RCB) design with three replications in wet (T. Aman) season. IR82589-B-B-84-3 was developed as a drought-tolerant rice variety BRRI dhan71, which plant height 108 cm and growth duration 115 days after proper evaluation by National Seed Board (NSB) Bangladesh. It was found that this variety is the higher drought tolerance (up to 28 days) during reproductive stage. It can produce 5.5 t/ha grain yield in standard condition and 4.0 t/ha grain yield in medium drought condition but 3.0-3.5 t/ha grain yield in severe drought condition. Grain yield is also not affected by water scarcity during reproductive stage where parch water table depth is more than 70-80 cm from the surface and reduced soil moisture (<20%). Thousand grain weight of the variety is 24 gm, amylose content is 24%. It has long, erect and deep green colored flag leaf. The results indicated that farmers can maximize net profit by cultivating BRRI dhan71 because it required less input, early maturing than existing varieties, drought tolerant and they also get opportunity to cultivate Mustard, Barley, Potato and vegetables after harvesting it. Thus total productivity will be augmented and food security can also be sustained by the cultivation of BRRI dhan71.

scholarly journals Polyethylene glycol damages grafted citrus plants based on biometric, physiological,and biochemical responses

2018 ◽  
Vol 40 (6) ◽  
Author(s):  
Eduardo Augusto Girardi ◽  
Andréa Dias Brandão ◽  
Rubens Duarte Coelho ◽  
Hilton Thadeu Zarate do Couto ◽  
Marcos Silveira Buckeridge ◽  
...  
Keyword(s):  
Drought Tolerance ◽  
Dry Weight ◽  
Rangpur Lime ◽  
Biochemical Responses ◽  
Biological Responses ◽  
Whole Plant ◽  
Peg 4000 ◽  
Root Starch ◽  
Plant Level ◽  
Physiological And Biochemical

Abstract Drought tolerance is a major trait for the selection of citrus rootstocks in breeding programs. PEG 4000 solution at 110 g L-1 (osmotic potential of -376 kPa) was used to evaluate biometric, physiological, and biochemical responses of grafted citrus plants in pots. ‘Valencia’ sweet orange plants grafted onto ‘Rangpur’ lime (drought tolerant) rootstock showed greater plant growth compared to that on ‘Swingle’ citrumelo (drought sensitive) rootstock, regardless of PEG-induced stress; however, biological responses to PEG were similar on both rootstocks. Plant dry weight, gas exchange, and leaf and root starch concentrations were reduced by PEG. Water potential at 2:00 p.m. and Fe and Mn leaf concentrations increased with severe phytotoxic symptoms. The results corroborate the limitation of PEG for assessing drought tolerance of citrus plants at the whole plant level.

scholarly journals The Study of drought tolerance capacity of Ceratoides arborescens

2021 ◽  
Vol 31 (3) ◽  
pp. 59-66
Author(s):  
Qing Ge-le ◽  
Togtokhbayar Norovsambuu ◽  
Altanzaya Tovuu ◽  
Enkhchimeg Vanjildorj
Keyword(s):  
Superoxide Dismutase ◽  
Drought Tolerance ◽  
Chlorophyll Content ◽  
Drought Resistance ◽  
Soil Conservation ◽  
Drought Condition ◽  
Main Component Analysis ◽  
Main Component ◽  
Biochemical Indices ◽  
Physiological And Biochemical

The Ceratoides arborescens is the kind of plant that can live in drought or extremeness drought condition. In drought grassland, desertification grassland and desertification area, they have important value in economy and ecology. The Ceratoides arborescens is one of the promising drought resisting species for developing natural meadow. In the article, a study was developed on two ecotypes of Ceratoides arborescens by observing physiological and biochemical indices of them. The results could be used to evaluate the drought resistance ability, give a guide for Ceratoides arborescens introduction, and make a function on desert control and water and soil conservation, developing meadow and pasturing by planting plant of the Ceratoides arborescens. The photosynthesis and chlorophyll content were gradually decreased with the increase of drought stressed days. In the stressed period, the decrease of ecotype of Kerqin’s photosynthesis and chlorophyll were less than that of ecotype of Wu. The proline and malondialdehyde (MDA) were gradually increased with the increase of drought stressed days. In the stressed period, the increase of ecotype of Kerqin’s proline and MDA were more than that of ecotype of Wu during the stressed period, the activity of superoxide dismutase (SOD) and catalase (CAT) increased firstly, reached the climax on the sixth day after stressed, then decreased. The activity of SOD and CAT of ecotype of Kerqin were higher than that of ecotype of Wu. It is considered that two ecotypes in Ceratoides arborescens both have strong drought resistance ability, and analyzing results of main component analysis and comprehensive appraisal of all indices, the drought resistance ability of ecotype of Kerqin is stronger than ecotype of Wu. Морин тэсэг (Ceratoides arborescens)-ийн ган тэсвэрлэх чадварын судалгаа Морин тэсэг нь удаан хугацааны туршид усгүй, гантай нөхцөлд амьдарч чаддаг ургамлуудын нэг юм. Тэсгийн төрлийн ургамлыг бэлчээр сайжруулахад ашиглах боломжтой бөгөөд хуурай уур амьсгалтай улиралд малын гол тэжээл болохоос гадна элсэрхэг хөрсөнд ургаж, элсний нүүдлийг зогсооход чухал нөлөөтэй. Бид энэхүү судалгаанд Морин тэсгийн Хорчин ба Улаанцав хэмээх 2 экотипийг ердийн усалгаатай нөхцөлд болон зохиомлоор гангийн стресст оруулсан нөхцөлд харьцуулан судалж гангийн стресс тэсвэрлэх чадварыг нь тогтоов. Гангийн стрессийн үргэлжлэх хугацаа уртсах тусам фотосинтезийн эрчим болон хлорофиллын агууламж хоёр экотипийн морин тэсэгт буурч байсан хэдий ч Хорчин тэсгийнх Улаанцав тэсгийнхээс 2.69% болон 0.19%-иар тус тус их байв. Гангийн стрессийн үргэлжлэх хугацаа уртсах тутам Морин тэсгийн хоёр экотипийн пролин ба малондиальдегидын агууламж нэмэгдэж байв. Супероксид дисмутаза (SOD) болон каталаза (CAT)-ийн идэвхжилт гангийн стрессийн үргэлжлэх эхний үед нэмэгдэж, дараа нь буурах зүй тогтолтой байсан бөгөөд Хорчин экотип нь Улаанцав экотипээс ганд илүү тэсвэртэй болох нь тогтоогдлоо.  Түлхүүр үгс: хлорофилл, пролин,  малондиальдегид, физиологийн үзүүлэлт, ган тэсвэр

Physiological and biochemical responses of harvested rambutan (Nephelium lappaceum L.) fruits to postharvest dip treatments during storage

2018 ◽  
Vol 19 (1&2) ◽  
pp. 217-222
Author(s):  
Manjunath J. Shetty ◽  
◽  
P.R. Geethalekshmi ◽  
C. Mini ◽  
Vijayaraghava Kumar ◽  
...  
Keyword(s):  
Biochemical Responses ◽  
Nephelium Lappaceum ◽  
Physiological And Biochemical

Morphological, Physiological and Biochemical Responses of Poplar Plants to Drought Stress

2018 ◽  
Vol 5 (03) ◽  
Author(s):  
ARADHNA KUMARI ◽  
IM KHAN ◽  
ANIL KUMAR SINGH ◽  
SANTOSH KUMAR SINGH
Keyword(s):  
Water Stress ◽  
Drought Stress ◽  
Biochemical Parameters ◽  
Sugar Content ◽  
Soluble Sugar ◽  
Field Capacity ◽  
Drought Event ◽  
Total Biomass ◽  
Biochemical Responses ◽  
Physiological And Biochemical

Poplar clone Kranti was selected to assess the morphological, physiological and biochemical responses under drought at different levels of water stress, as it is a common clone used to be grown in Uttarakhand for making paper and plywood. The cuttings of Populus deltoides L. (clone Kranti) were exposed to four different watering regimes (100, 75, 50 and 25% of the field capacity) and changes in physiological and biochemical parameters related with drought tolerance were recorded. Alterations in physiological (i.e. decrease in relative water content) and biochemical parameters (i.e. increase in proline and soluble sugar content and build-up of malondialdehyde by-products) occurred in all the three levels of water stress, although drought represented the major determinant. Drought treatments (75%, 50% and 25% FC) decreased plant height, radial stem diameter, harvest index, total biomass content and RWC in all the three watering regimes compared to control (100% FC). Biochemical parameters like proline, soluble sugar and MDA content increased with severity and duration of stress, which helped plants to survive under severe stress. It was analyzed that for better wood yield poplar seedlings should avail either optimum amount of water (amount nearly equal to field capacity of soil) or maximum withdrawal up to 75% of field capacity up to seedling establishment period (60 days). Furthermore, this study manifested that acclimation to drought stress is related with the rapidity, severity, and duration of the drought event of the poplar species.

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