Growth, physiological, and heavy metal accumulation traits at seedling stage under heavy metal stress in castor (Ricinus communis L.)
Notice bibliographique
Résumé
<p indent=0mm>Agricultural ecology environment and human health are seriously threated by aggravating agricultural non-point source and heavy metals pollution. It is of great significance to explore the cumulative effect of crops on heavy metal pollution and its physiological mechanism. A castor (<italic>Ricinus communis </italic>L.) variety Zibi 5 was used to study the accumulation effect of heavy metals and associated physiological mechanism under heavy metals treatments (Cu, Zn and Cd at 0, 30, 60, and <sc>120 mg L<sup>-1</sup></sc> concentrations). The results showed that seedling growth, physiological traits and heavy metals accumulation significantly affected by heavy metal treatments. Plant height was increased to the maximum with <sc>60 mg L<sup>-1</sup></sc> and then decreased. However, root length, fresh weight and dry weight were all decreased under heavy metal treatments. In general, SOD activity was decreased at low treatment concentration but increased at high treatment concentration, the highest activity was showed at <sc>120 mg L<sup>-1</sup></sc> under Cu and Zn treatments at 10 DAS (days after sowing), which were 45.5% and 31.8% higher than that under CK, respectively. POD activity was first decreased and then increased on 10 DAS, but significantly increased in both 25 DAS and 45 DAS, as well as prominently increased with prolonged the growth periods. Soluble protein was only significantly increased under <sc>120 mg L<sup>-1</sup></sc> Cu treatment, and increased by 18.8%, 66.7%, and 83.3% at each growth stage, respectively. MDA content was significantly increased with the increase of treatment concentration and significantly decreased with prolonged the growth periods, and MDA content was significant higher under Cd treatment than that under Cu and Zn treatments. The accumulation contents of Cu, Zn, and Cd in castor plant were gradually increased with the increase of treatment concentration, and the maximum accumulation was at <sc>120 mg L<sup>-1</sup></sc> concentration. Among of them, the accumulation of treatment concentration increased, and the maximum accumulation showed at <sc>120 mg L<sup>-1</sup></sc> concentration. Among them, the accumulation of Zn was the highest, followed by Cd. The accumulation content of heavy metals in each organ was shown as root > stem > leaf. This study suggested that castor has a certain tolerance to heavy metals, which was increased the antioxidase activity to alleviate heavy metals stress. The castor has organ specificity in heavy metals accumulation. It is an effective approach to plant castor to repair soil pollution by heavy metals such as Cu, Zn, and Cd.
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Comment cette classification a été obtenuedéplier
Prédiction distillée sur la base complète
Imitation des enseignantsNi prévalence calibrée, ni vérité terrain. Validation humaine à venir. Apprise à partir de 10 348 étiquettes directes de Codex et de 10 348 étiquettes directes de Gemma. Le mode candidate est l'union des têtes enseignantes seuillées; le consensus est leur intersection. Ces sorties portent le statut machine_predicted_unvalidated et ne sont ni des étiquettes humaines ni des étiquettes directes de modèles de pointe.
Scores Codex et Gemma par catégorie
| Catégorie | Codex | Gemma |
|---|---|---|
| Métarecherche | 0,000 | 0,000 |
| Méta-épidémiologie (sens strict) | 0,000 | 0,000 |
| Méta-épidémiologie (sens large) | 0,000 | 0,000 |
| Bibliométrie | 0,000 | 0,000 |
| Études des sciences et des technologies | 0,000 | 0,000 |
| Communication savante | 0,000 | 0,000 |
| Science ouverte | 0,000 | 0,000 |
| Intégrité de la recherche | 0,000 | 0,000 |
| Charge utile insuffisante (le modèle a refusé de juger) | 0,000 | 0,000 |
Scores machine (provisoires)
Les deux têtes enseignantes du modèle étudiant, lues sur ce travail. Un score ordonne la base pour la relecture; il n'affirme jamais une catégorie, et le statut de validation accompagne chaque rangée tel quel.
Scores de référence d'un modèle non mature (critères de maturité non atteints, 7 itérations). Un score ordonne; il n'affirme jamais une catégorie.
score_only:v0-immature-baseline · tel quel depuis la passe de notation : score_only signifie que le nombre peut ordonner les travaux, et qu'aucune étiquette de catégorie n'en découleClassification
machine, non validéePrédiction automatique; un appel candidat d’une seule tête enseignante, pas un consensus.
Le détail, modèle par modèle et score par score, se trouve en fin de page sous « Comment cette classification a été obtenue ».