A Roychoudhury

AA Abdel-Latef

C Lillo

C Masclaux-Daubresse

CG Liang

CJ Huang

D Rhodes

DA Cataldo

DC Shi

DS Skopelitis

E Gajewska

EW Yemm

GV Undovenko

J Kochba

K Kong-Ngern

LS Bates

MD Groppa

MD Krom

ML Orozco-Cardenas

MM Bradford

PL Xu

R Alcázar

RS Dhindsa

S Wasti

TB Dev

WB Frommer

XH Hu

Abstract
          
            Background
            Tomato is one of the most popular vegetables, and middle tolerance for salt stress. Spermidine (Spd) has an important role in plant defense mechanisms against abiotic stress; however, relatively few data are available regarding Spd in responses of tomato to saline-alkaline stress. The effect of 0.25 mmol/L Spd on some physiological parameters of two tomato cultivars grown in 75 mmol/L saline-alkaline solutions were studied. Two cultivars are cv. Jinpeng chaoguan which is a highly salt-tolerant ecotype and cv. Zhongza No. 9 which is more salt-sensitive ecotype.
          
          
            Results
            Saline-alkaline stress upset nitrogen metabolism, induced the antioxidant enzyme activities, and accumulated much more reactive oxygen species (ROS) and osmoregulation substances in two tomato cultivars leaves. Under saline-alkaline stress condition, Spd-treated seedlings accumulated more osmoregulation substances and had greater activities of antioxidative enzymes. Exogenous Spd counteracted the stress-induced increase of contents of malondialdehyde and ammonium, glutamate dehydrogenase activity, and decreased in nitrate, nitrate reductase, nitrite reductase, glutamine synthetase, glutamate synthase, glutamate oxaloacetate transaminase, and glutamate pyruvate transaminase activities. Additionally, the effect of Spd was more significantly in salt-sensitive cultivar ‘Zhongza No. 9’.
          
          
            Conclusions
            Overall, exogenous spermidine can attenuate negative effects of saline-alkaline stress on tomato seedlings which effects may depend on the plant species, and even cultivars.
          </jats:sec

Yi Zhang

Li Zhang

Xiao-Hui Hu

Crossref

Botanical Studies

Exogenous spermidine-induced changes at physiological and biochemical parameters levels in tomato seedling grown in saline-alkaline condition

https://as-botanicalstudies.springeropen.com/track/pdf/10.1186/s40529-014-0058-2?site=as-botanicalstudies.springeropen.com

Exogenous spermidine-induced changes at physiological and biochemical parameters levels in tomato seedling grown in saline-alkaline condition

Abstract

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