Effects of Salt-Drought Stress on Growth and Physiobiochemical Characteristics ofTamarix chinensisSeedlings

Abstract

The present study was designed to clarify the effects of salinity and water intercross stresses on the growth and physiobiochemical characteristics of Tamarix chinensis seedlings by pots culture under the artificial simulated conditions. The growth, activities of SOD, POD, and contents of MDA and osmotic adjusting substances of three years old seedlings of T. chinensis were studied under different salt-drought intercross stress. Results showed that the influence of salt stress on growth was greater than drought stress, the oxidation resistance of SOD and POD weakened gradually with salt and drought stresses intensified, and the content of MDA was higher under severe drought and mild and moderate salt stresses. The proline contents increased with the stress intensified but only significantly higher than control under the intercross stresses of severe salt-severe drought. It implied that T. chinensis could improve its stress resistance by adjusted self-growth and physiobiochemical characteristics, and the intercross compatibility of T. chinensis to salt and drought stresses can enhance the salt resistance under appropriate drought stress, but the dominant factors influencing the physiological biochemical characteristics of T. chinensis were various with the changing of salt-drought intercross stresses gradients.

Effects of methyl jasmonate on growth, antioxidants, and carbon and nitrogen metabolism of Glycyrrhiza uralensis under salt stress

“…The O2 and H 2 O 2 content increases in the leaves and petals of Tagetes erecta under long-term salt stress (Garg and Bhandari 2016). Salt stress increases the MDA content and membrane permeability of Ammodendron bifolium, Gleditsia sinensis (Liu et al 2014), and G. uralensis plants (Pan et al 2006). These results are similar to those observed in the present study.…”

“…Ji et al (2009) found that MeJA treatment counteracts the negative effects of salt stress on the growth, chlorophyll content, leaf photosynthetic rate, leaf transpiration rate, and proline content of soybean plants grown in a hydroponic medium. MeJA induces the expression of pathogenesis-related proteins (PR), such as PR-1 and PR-10, and salt-stress responsive protein in the roots of rice plants to combat stress (Moons et al 1997). Furthermore, MeJA can affect the whole-plant resource allocation of nitrogen-and carbon-containing substrates under stress (Gómez et al 2010).…”

ARF family identification in Tamarix chinensis reveals the salt responsive expression of TcARF6 targeted by miR167

“…Tamarisk plants exist as shrubs or small trees that are naturally distributed in saline soils of Eurasia, the Mediterranean basin and northern and southwestern Africa (Marlin et al, 2017;Sanz Elorza et al, 2010). Tamarix chinensis Lour is one of the most highly salt-tolerant tree species that is well suited for investigating salt-stress-response genes (Liu et al, 2014). The high salt tolerance of tamarisk trees was shown by tolerance limit studies and on 340 mM (2% (m/v)) NaCl treatment for 1 week caused no physiological damage to T. chinensis (Wang et al, 2018a).…”

Salt Stress Effects on Avocado (Persea americana Mill.) Plants with and without Seaweed Extract (Ascophyllum nodosum) Application

“…It should be noted that the aerial part is often related to the root part [31]. Du Jardin [32] observed that proline increases tissue concentrations and the root-to-shoot transport of micronutrients.…”