Access the full text.
Sign up today, get DeepDyve free for 14 days.
Legumes grow in temperate and warm climates, being susceptible to unpredictable episodes of water deficit. This study aimed to evaluate (i) morphology and N‐compound contents in roots and nodules, (ii) N and C contents in shoots and (iii) crop yield in two peanut cultivars with contrasting drought tolerance, inoculated with a reference N‐fixing strain and challenged by water deficit conditions. For that, seeds of two peanut cultivars, Granoleico (sensitive, S) and EC‐98 (tolerant, T) were inoculated with Bradyrhizobium sp. SEMIA6144 and 30 days after sowing, plants were separated into the experimental groups: control, drought stress and drought stress and subsequent rehydration. Although the results obtained on root anatomy and histology revealed differential responses between cultivars, they were not associated with tolerance traits in EC‐98 (T). In contrast, nodules of EC‐98 (T) showed invariable diameter and infection zone upon the exposition to drought stress and rehydration compared to nodules of Granoleico (S) plants exposed to the same treatments. EC‐98 (T) showed invariable contents of C in shoots and of nitrates and ureides in roots and nodules of stressed and rehydrated plants, an increase in total amino acids only in nodules of stressed plants and a small reduction in N‐content (compared with the sensitive cultivar). The status of these variables related to C‐ and N‐metabolism could be associated with an efficient biological nitrogen fixation. Besides, EC‐98 (T) yielded better both in a crop cycle with adequate water supply and in a dry year and the inoculation improved yield in both cultivars. Thus, the inoculation with N‐fixing bacteria is recommended for EC‐98 (T) in seasons with expected drought stress cycles in crops.
Journal of Agronomy and Crop Science – Wiley
Published: Mar 1, 2023
Keywords: Arachis hypogaea L.; biological nitrogen fixation; drought stress; primary metabolism; rehydration
Read and print from thousands of top scholarly journals.
Already have an account? Log in
Bookmark this article. You can see your Bookmarks on your DeepDyve Library.
To save an article, log in first, or sign up for a DeepDyve account if you don’t already have one.
Copy and paste the desired citation format or use the link below to download a file formatted for EndNote
Access the full text.
Sign up today, get DeepDyve free for 14 days.
All DeepDyve websites use cookies to improve your online experience. They were placed on your computer when you launched this website. You can change your cookie settings through your browser.