OSMOREGULATION IN HIGHER PLANTS: EFFECTS OF NaCl SALINITY ON NON‐NODULATED PHASEOLUS AUREUS L. I. GROWTH AND MINERAL CONTENT

Abstract

SUMMARY The adaptation, growth and changes in mineral composition of Phaseolus aureus L. were studied at six levels of NaCl, ranging from 10 to 200 mM. Plants tolerated up to 150 mM NaCl in the growth medium although their growth and mineral composition were adversely affected. Accumulation of Na+ in plant tissue increased with increasing NaClext reaching toxic concentrations and inhibited transport of different inorganic ions. K+ constituted only about 10 % of the total mineral content of plants grown in 150 mM NaCl as against 55 % in the controls. The principal balancing anion to counter Na+ accumulation was Cl−. ‘Ion excess’ in the plant is suggested to be the cause of reduced growth. The behaviour of P. aureus under condition of salt stress is discussed.

Remediation of Arsenic Toxicity in the Soil-Plant System by Using Zinc Fertilizers

“…It could be due to the fact that at low concentration of As, the P availability or Fe availability was favored which caused this yield increase. Similar observations were found at low concentration of an antagonistic or otherwise not essential element favor growth with Na for a different crop [19]. It needs to be further mentioned that the fresh matter yield was better than control for all the other treatments.…”

Root spatial metabolite profiling of two genotypes of barley(Hordeum vulgareL.) reveals differences in response to short-term salt stress

“…In two rice genotypes with different salt tolerance levels, most AAs and sugars significantly increased in the leaves and roots of both genotypes; however, the salt-tolerant genotype had a more prolonged response over time ( Zhao et al , 2014 ). Asparagine and glutamine have both been reported to accumulate in response to salt stress ( Imamul Huq and Larher, 1983 ; Mansour, 2000 ). Asparagine has a high N:C and thus is an ideal storage compound that accumulates under stress conditions ( Lea et al , 2007 ).…”

Ecofisiología y bioquímica de Salicornia bigelovii (Torr.) Por efecto de quitosano-aib bajo condiciones del desierto de Sonora

“…Los resultados del análisis proximal, evidenciaron el alto contenido de cenizas en tallo y fracción área en comparación con raíz; los resultados obtenidos en las variables evaluadas coinciden con autores como (Karlova & de Vries, 2006), quienes indican que los compuestos bioestimulantes son capaces de estimular e incrementar los valores bromatológicos debido al crecimiento de tallos, hojas, frutos, además de incrementar rendimiento del cultivo comparado con las plantas donde no son aplicados. Por otra parte, (Imamul Huq. & Larher., 1983, indican que en halófitas el incremento de bioproductos a nivel celular, se relaciona con el proceso de osmoregulación, donde es necesario que un sistema contiguo sea más concentrado del otro.…”