Loading…
Nutritional, Physiological, and Enzymatic Responses of Native Grasses from the Pampa Biome Cultivated Under Excess Zinc
Some soils in Brazil are contaminated with zinc (Zn). Even though it is an essential micronutrient, Zn, when in excess, harms plant growth. The Pampa biome has a great diversity of grasses. However, few studies have evaluated the growth potential and physiological and biochemical responses of these...
Saved in:
Published in: | Journal of soil science and plant nutrition 2024-03, Vol.24 (1), p.1394-1406 |
---|---|
Main Authors: | , , , , , , , , , , |
Format: | Article |
Language: | English |
Subjects: | |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
Summary: | Some soils in Brazil are contaminated with zinc (Zn). Even though it is an essential micronutrient, Zn, when in excess, harms plant growth. The Pampa biome has a great diversity of grasses. However, few studies have evaluated the growth potential and physiological and biochemical responses of these plants to excess Zn. The study aimed to evaluate, physiological point of view, the native grass species of the Pampa biome most tolerant species to excess Zn. The grass species of the Pampa biome used in the experiment were
Andropogon lateralis
,
Axonopus affinis
,
Paspalum plicatulum
, and
Paspalum notatum
. Three Zn doses were added to the solution, corresponding to 2 μM (original concentration of the nutrient solution), 150, and 300 μM of Zn in the form of ZnCl
2
for the cultivation of the four grasses. The increase in Zn availability increased the photosynthetic rate in the four species.
Andropogon lateralis
increased shoot and root dry matter production with increasing Zn concentration in solution.
Andropogon lateralis
increased phosphorus (P) retention in the root system, contributing to the increase of Zn in the roots.
Axonopus affinis
does not reduce its shoot growth when faced with increased Zn levels. Zn translocation when exposed to intermediate Zn levels. In
Paspalum Notatum
, antioxidant enzymatic activity is induced in response to excess Zn.
Paspalum plicatulum
absorbs a high concentration of Zn in the shoot.
Andropogon laterallis
was the only plant that showed an increase in biomass when grown in a higher dose of Zn. |
---|---|
ISSN: | 0718-9508 0718-9516 |
DOI: | 10.1007/s42729-024-01644-w |