Translator Disclaimer
8 May 2019 Water-shortage tolerance and recovery after rehydration in the Chihuahuan Desert plant Yucca filifera (Asparagaceae)
Author Affiliations +
Abstract

We evaluated several mechanisms that enable saplings of Yucca filifera (Chabaud) to endure water shortage. Saplings were exposed to water shortage and subsequent rewatering inside a greenhouse. The response variables were maximum quantum efficiency (Fv/Fm), effective quantum yield of photosystem II (ΦPSII), nonphotochemical quenching (NPQ), electron transport rate (ETR), leaf relative water content, titratable acid (ΔH+), pigment content (chlorophylls a and b, total carotenoids, chlorophyll a+b/carotenoids ratio, and chlorophyll a/ b ratio), antioxidant activity, and proline accumulation. We hypothesized that Y. filifera saplings tolerate water shortage, and that rewatering favors the sapling development. We found that Fv/Fm and ΦPSII values as well as ΔH+ and chlorophyll a/b ratio were strongly affected by water shortage, and their values reverted after rewatering. We also found higher NPQ, antioxidant activity, and proline content during the water-shortage treatment, which might represent mechanisms for preventing photodamage. The high ability of Y. filifera saplings to withstand stress caused by water shortage indicates that it could be a key species for conservation and restoration of degraded arid ecosystems.

©Copyright 2019 by the Torrey Botanical Society
Claudia González-Salvatierra "Water-shortage tolerance and recovery after rehydration in the Chihuahuan Desert plant Yucca filifera (Asparagaceae)," The Journal of the Torrey Botanical Society 146(2), 128-137, (8 May 2019). https://doi.org/10.3159/TORREY-D-18-00001.1
Received: 4 January 2018; Published: 8 May 2019
JOURNAL ARTICLE
10 PAGES


SHARE
ARTICLE IMPACT
RIGHTS & PERMISSIONS
Get copyright permission
Back to Top