Differential nickel tolerance of mung bean (Vigna radiata L.) genotypes in nutrient culture
Year: 1998
Type: article
Abstract: Eight cultivars of mung bean (Vigna radiata L.) were tested for their tolerance to different levels of nickel (Ni) (0,6,12, 18 and 24 μM) in nutrient solution at pH 6.8.Seeds were germinated and grown in the presence of nick- el under controlled environmental conditions.Standard growth parameters such as root length, shoot length, root/shoot dry biomass production and root/shoot tolerance index were used as markers of nickel toxicity.Measurements as early as 24 h after the beginning of treatment did not yield consistent results.However, root measurements 3, 6 and 9 days after the beginning of treatments yielded significant differences among cultivars which were similar to field performance in nickel-rich soils.The cultivars Dhauli and PDM-116 showed root growth while LGG-407, K-851, TARM-22 and TARM-1, TARM-21, TARM-26 exhibited a reverse trend in root growth in the presence of nickel (12 μM).The root tol- erance index (RTI) and the shoot tolerance index (STI) with respect to Dhauli and PDM-116 were high indicating their tolerance to nickel; TARM-21 and TARM-26, however, showed a low RTI and STI.Based on the growth parameters eight cultivars of mung bean were ranked with respect to their tolerance to nickel: Dhauli > PDM-116 > LGG-407 > K-851 > TARM-22 > TARM-1 > TARM-21> TARM-26.Nickel induced greater G6PDH and GDH activity in Dhauli and PDM-116 as compared to .This method can be employed for quick screening of mung bean for nickel tolerance.(© Inra/Elsevier, Paris.)nickel toxicity / glucose-6-phosphate dehydrogenase / glutamate dehydrogenase / mung bean / screening Résumé -Tolérance au nickel de divers génotypes de haricot mungo (Vigna radiata L.) cultivés sur solution nutri- tive.On a testé la tolérance de huit cultivars de haricot mungo à divers niveaux de nickel (Ni) (0, 6, 12, 18 et 24 μM)présents dans une solution nutritive à pH 6,8.Les graines ont germé et se sont développées en présence de nickel en conditions de milieu contrôlées.Les paramètres standard de la croissance, tels que la longueur des racines, la longueur des pousses, la production de biomasse des racines et celle des pousses, l'indice de tolérance des racines et celui des pousses, ont été utilisés comme marqueurs de la toxicité du Ni.Les mesures faites 24 h après le début du traitement n'ont Communicated by Marco Trevisan (Piacenza, Italy)
Source: Agronomie
Institution: Regional Plant Resource Centre
Language: English
Subfield: Plant Science
Domain: Life Sciences
SDG: Zero hunger
Open Access status: bronze
OpenAlex ID: W2048286523