Emergence, Growth and Production of Sesame Under Salt Stress and Proportions of Nitrate and Ammonium

Abstract

-In arid and semi-arid regions, the quality of irrigation water varies in geographic terms and during the year, and the occurrence of water with high concentrations of salts is common. In this context, this study aimed to evaluate the emergence, growth and production of sesame, cultivar CNPA G3, irrigated with saline water and fertilized with N of different carrier proportions by the ratio of nitrate and ammonium (NO 3 --N and NH 4 + -N) in an experiment conducted in lysimeters arranged in a greenhouse in the municipality of Campina Grande-PB, Brazil. The treatments were distributed into randomized blocks using a 5 × 5 factorial scheme relative to levels of irrigation water salinity (ECw; 0.6, 1.2, 1.8, 2.4 and 3.0 dS m EMERGÊNCIA, CRESCIMENTO E PRODUÇÃO DE GERGELIM SOB ESTRESSE SALINO E PROPORÇÕES DE NITRATO E AMÔNIORESUMO -Nas regiões áridas e semiáridas a qualidade da água usada na irrigação varia em termos geográficos e ao longo do ano, sendo comum a ocorrência de águas com elevada concentração de sais. Neste contexto, objetivou-se com este trabalho avaliar a emergência, crescimento e a produção do gergelim cv. CNPA G3 irrigado com águas salinas e adubado com proporções de N pela relação nitrato e amônio (N-NO 3 -e N-NH 4 + ) em ensaio conduzido em lisímetros dispostos em casa de vegetação no município de Campina Grande, PB. Os tratamentos foram distribuídos em blocos ao acaso usando o esquema fatorial 5 x 5 relativos aos valores de condutividade elétrica da água de irrigação -CEa (0,6; 1,2; 1,8; 2,4 e 3,0 dS m

Regulation of Ammonium Cellular Levels is An Important Adaptive Trait for the Euhalophytic Behavior of Salicornia europaea

“…Salt stress induced NH 4 + accumulation has been associated to the inactivation of specific enzymes involved in NH 4 + homeostasis [3,18], including glutamine synthetase (GS) and glutamate dehydrogenase (GDH) which can maintain NH 4 + cellular concentrations below toxicity levels by incorporating it into amino acids [22,23]. It has also been reported that NH 4 + fertilization in both Populus simonii and Sesamum indicum worsens the detrimental effects of salt stress on physiological and growth parameters, which indicates that high NH 4 + under salinity does not help plants cope with salinity [24,25]. Despite this, NH 4 + nutrition has been reported to enhance salt tolerance in citrus plants [26], Spartina alterniflora [27] and other wetland plants [28].…”

Physical properties of sesame seeds harvested at different maturation stages and thirds of the plant

“…Sesame is grown in several countries, especially in Africa and Asia, and plays an important role in human consumption and in the pharmaceutical and cosmetic industries with the production of seeds and oil (Anilakumar et al, 2010). The oil in the seeds represents between 34% and 59% of its constitution (Emamgholizadeh et al, 2015) and it is considered noble; its application can be seen in several sectors of the industry, such as in the manufacture of pies, margarine, lubricants, soap, perfumes, and drugs (Dias et al, 2017).…”