نتایج جستجو برای: relative growth rate rgr

تعداد نتایج: 2001949  

به‌منظور بررسی اثرهای تراکم بوته بر شاخصهای رشد گلرنگ (Carthamus tinctorius L.) در شرایط دیم دماوند، آزمایشی در ایستگاه تحقیقات مراتع همند آبسرد (دماوند) با بارندگی 315 میلی‌متر در سال زراعی 83-82 به اجرا درآمد. این آزمایش در قالب طرح بلوکهای کامل تصادفی با 3 تیمار و 5 تکرار انجام شد. در این تحقیق اثر تراکم‌های 14، 20 و 29 بوته در متر مربع، بر شاخصهای رشد، Relative growth rate (RGR)، Crop growt...

Journal: :Evolution; international journal of organic evolution 2014
Amy L Angert Sarah Kimball Megan Peterson Travis E Huxman David L Venable

Trade-offs are central to many topics in biology, from the evolution of life histories to ecological mechanisms of species coexistence. Trade-offs observed among species may reflect pervasive constraints on phenotypes that are achievable given biophysical and resource limitations. If so, then among-species trade-offs should be consistent with trade-offs within species. Alternatively, trait vari...

Journal: :Agronomy 2021

Salinity is a leading threat to crop growth throughout the world. Salt stress induces altered physiological processes and several inhibitory effects on of cereals, including wheat (Triticum aestivum L.). In this study, we determined salinity five spring winter genotypes seedlings. We evaluated salt root shoot attributes, i.e., length (RL), (SL), relative rate (RGR-RL), (RGR-SL). The ionic conte...

Journal: :Water 2023

The effect of different CO2 concentrations and their subsequent light changes on the photosynthetic characteristics Porphyra yezoensis are not well understood. relationship between availability to physiological traits thalli could help understand response adaptation mechanisms P. extreme weather changes. In this study, at was determined. Under low intensity, high concentration promoted relative...

Journal: :تحقیقات آفات گیاهی 0
فرشته امیر محمدی جلال جلالی سندی

essential oil of rosmarinus officinallis was investigated on toxicity and physiological aspect of elm leaf beetle xanthogaleruca luteola mull. for 3rd instar larvae and adults in controlled condition (25 ± 2 °c; 14:10ld; 65% rh). lc50 were estimated 2.55 and 1.11 for 3rd instar larvae and adults respectively. the effect of lc50 dose on remaining insects were investigated on nutritional indices....

African yam bean (Sphenostylis stenocarpa) is an underexploited legume with the potential of becoming an alternative food staple to alleviate the problem of food security. An assessment was carried out on the growth and yield of AYB affected by Telfairia mosaic virus (TeMV) Infection. Telfairia mosaic virus caused severe mosaic, leaf distortion and malformation on AYB. Analyses of results revea...

2013
Tao Hu Longxing Hu Xunzhong Zhang Pingping Zhang Zhuangjun Zhao Jinmin Fu

Little is known about the effects of NaCl stress on perennial ryegrass (Lolium perenne L.) photosynthesis and carbohydrate flux. The objective of this study was to understand the carbohydrate metabolism and identify the gene expression affected by salinity stress. Seventy-four days old seedlings of two perennial ryegrass accessions (salt-sensitive 'PI 538976' and salt-tolerant 'Overdrive') were...

ژورنال: علوم آب و خاک 2001
ارزانی, احمد , بانکه ساز, احمد, صلواتی, محمدرضا , میرلوحی, آقافخر,

This study was conducted to evaluate the responses of Iranian commercial genotypes of maize (hybrids and their inbred lines) to callus induction and plant regeneration, using mature embryos. Twenty five genotypes comprising of 12 inbred lines, 11 single cross hybrids, 1 double cross hybrid and 1 composite cultivar were used. Mature embryos of the genotypes were plated on MS and N6 media. Callus...

Journal: :The New phytologist 2007
Carolyn Glynn Daniel A Herms Colin M Orians Robert C Hansen Stig Larsson

Here, the growth-differentiation balance hypothesis (GDBH) was tested by quantifying temporal variation in the relative growth rate (RGR), net assimilation rate (NAR), and phenylpropanoid concentrations of two willow species (Salix sericea and Salix eriocephala) across five fertility levels. Initially, RGR increased and total phenylpropanoids declined (although every individual phenolic did not...

Journal: :International Journal of Enviornment and Climate Change 2023

A field experiment was conducted at College Farm, Agricultural College, Rajendranagar, Hyderabad, during kharif 2019-20 and 2020-21 to study the effect of genotypes integrated nutrient management practices on growth HDPS cotton. Experiment laid out in Split plot design, with two as main plots (M) nine Integrated Nutrient Management sub-plots (S). Among genotypes, Leaf Area Index (LAI), Absolute...

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