Next Article in Journal
Metabolic Profiling of Buddleia indica Leaves using LC/MS and Evidence of their Antioxidant and Hepatoprotective Activity Using Different In Vitro and In Vivo Experimental Models
Next Article in Special Issue
Nitric Oxide and Hydrogen Sulfide in Higher Plants under Physiological and Stress Conditions
Previous Article in Journal
Diallyl Trisulfide Protects Rat Brain Tissue against the Damage Induced by Ischemia-Reperfusion through the Nrf2 Pathway
Previous Article in Special Issue
Regulation of Hydrogen Sulfide Metabolism by Nitric Oxide Inhibitors and the Quality of Peaches during Cold Storage
Open AccessArticle

d-Cysteine-Induced Rapid Root Abscission in the Water Fern Azolla Pinnata: Implications for the Linkage between d-Amino Acid and Reactive Sulfur Species (RSS) in Plant Environmental Responses

1
Faculty of Science, University of the Ryukyus, Okinawa 903-0213, Japan
2
Department of Biology, Sonoma State University, Rohnert Park, CA 94928, USA
*
Author to whom correspondence should be addressed.
Antioxidants 2019, 8(9), 411; https://doi.org/10.3390/antiox8090411
Received: 1 July 2019 / Revised: 13 September 2019 / Accepted: 16 September 2019 / Published: 18 September 2019
Reactive Oxygen Species (ROS) and Reactive Nitrogen Species (RNS) have been proposed as universal signaling molecules in plant stress responses. There are a growing number of studies suggesting that hydrogen sulfide (H2S) or Reactive Sulfur Species (RSS) are also involved in plant abiotic as well as biotic stress responses. However, it is still a matter of debate as to how plants utilize those RSS in their signaling cascades. Here, we demonstrate that d-cysteine is a novel candidate for bridging our gap in understanding. In the genus of the tiny water-floating fern Azolla, a rapid root abscission occurs in response to a wide variety of environmental stimuli as well as chemical inducers. We tested five H2S chemical donors, Na2S, GYY4137, 5a, 8l, and 8o, and found that 5a showed a significant abscission activity. Root abscission also occurred with the polysulfides Na2S2, Na2S3, and Na2S4. Rapid root abscission comparable to other known chemical inducers was observed in the presence of d-cysteine, whereas l-cysteine showed no effect. We suggest that d-cysteine is a physiologically relevant substrate to induce root abscission in the water fern Azolla. View Full-Text
Keywords: abscission; Azolla; d-amino acid; d-cysteine; H2S; polysulfide; stress response abscission; Azolla; d-amino acid; d-cysteine; H2S; polysulfide; stress response
Show Figures

Figure 1

MDPI and ACS Style

Yamasaki, H.; Ogura, M.P.; Kingjoe, K.A.; Cohen, M.F. d-Cysteine-Induced Rapid Root Abscission in the Water Fern Azolla Pinnata: Implications for the Linkage between d-Amino Acid and Reactive Sulfur Species (RSS) in Plant Environmental Responses. Antioxidants 2019, 8, 411.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop