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1. Arbuscular mycorrhizal fungus alters root-sourced signal (abscisic acid) for better drought acclimation in Zea mays L. seedlings

Author:
Ren, Ai-Tian; Zhu, Ying; Chen, Ying-Long; Ren, Hong-Xu; Li, Ji-Yuan; Kay Abbott, Lynette; Xiong, You-Cai
Source:
Environmental and experimental botany 2019 v.167 pp. 103824
ISSN:
0098-8472
Subject:
Glomus mosseae; Zea mays; abscisic acid; acclimation; antioxidant enzymes; biomass production; corn; drought; drought tolerance; drying; enzyme activity; leaves; malondialdehyde; mycorrhizal fungi; peroxidase; photosynthesis; phytomass; plant growth; proline; root zone drying; roots; seedlings; soil; stomatal conductance; stomatal movement; superoxide dismutase; vesicular arbuscular mycorrhizae; water stress; water uptake; water use efficiency
Abstract:
... Inoculation with arbuscular mycorrhizal (AM) fungi can modify stomatal behavior and increase antioxidant enzyme activities and therefore play a pivotal role in plant growth. We hypothesised that inoculation with AM fungi postpones the non-hydraulic root signal and alters physiological and biochemical traits, which enhances drought tolerance and water-use efficiency (WUEB) for plant biomass. Two po ...
DOI:
10.1016/j.envexpbot.2019.103824

2. Osmolyte accumulation plays important roles in the drought priming induced tolerance to post-anthesis drought stress in winter wheat (Triticum aestivum L.)

Author:
Wang, Xiao; Mao, Zhiqiang; Zhang, Jia; Hemat, Mehmood; Huang, Mei; Cai, Jian; Zhou, Qin; Dai, Tingbo; Jiang, Dong
Source:
Environmental and experimental botany 2019 v.166 pp. 103804
ISSN:
0098-8472
Subject:
Triticum aestivum; cell membranes; drought; enzyme activity; flowering; gene expression; gene expression regulation; grain yield; leaves; osmotic pressure; oxidative stress; peroxidation; photosynthesis; plant morphology; proline; roots; sucrose; sucrose-phosphate synthase; water stress; winter wheat
Abstract:
... Winter wheat were subjected to moderate drought priming before anthesis and then to a severe drought stress after anthesis. The plant morphology, osmolyte accumulation related traits in both leaves and roots were analysed during the priming, the post-anthesis drought stress, and the recovery from the drought stress. The primed plants (PD) showed lower reduction in leaves dry weight and grain yield ...
DOI:
10.1016/j.envexpbot.2019.103804

3. A salicylic acid carboxyl methyltransferase-like gene LcSAMT from Lycium chinense, negatively regulates the drought response in transgenic tobacco

Author:
Wang, Gang; Li, Qian; Wang, Chang; Jin, Chao; Ji, Jing; Guan, Chunfeng
Source:
Environmental and experimental botany 2019 pp. 103833
ISSN:
0098-8472
Subject:
Escherichia coli; Lycium chinense; S-adenosylmethionine; abscisic acid; catalase; chlorophyll; crop yield; crops; drought; drought tolerance; environmental factors; gene overexpression; genes; growth and development; leaves; messenger RNA; methyl salicylate; methylation; methyltransferases; oxidative stress; photosynthesis; plant development; plant growth; proline; salicylic acid; superoxide dismutase; tobacco; transgenic plants; water stress
Abstract:
... Drought is the main environmental factor which limits growth, photosynthesis and yield of agricultural crops worldwide. Salicylic acid (SA) is a phenolic compound involved in plant growth and development. Salicylic acid carboxyl methyltransferase (SAMT) can catalyze the methylation of SA with S-adenosyl-L-methionine as the methyl donor to form methyl salicylate (MeSA). However, the relations betwe ...
DOI:
10.1016/j.envexpbot.2019.103833

4. Adaptation of sugarcane plants to saline soil

Author:
Chiconato, Denise Aparecida; da Silveira Sousa Junior, Gilmar; dos Santos, Durvalina Maria Mathias; Munns, Rana
Source:
Environmental and experimental botany 2019 v.162 pp. 201-211
ISSN:
0098-8472
Subject:
betaine; cultivars; genetic variation; genotype; leaf area; leaves; lipid peroxidation; photosynthesis; proline; roots; saline soils; salinity; salt tolerance; sodium; sodium chloride; sucrose; sugarcane; tropics
Abstract:
... Sugarcane is an important crop in tropical regions of the world, often being exposed to environments with high salinity, but little is known of genetic variation in salt tolerance. The aim of this work was to compare the performance of two genetically diverse cultivars of sugarcane under different concentrations of salinity (0, 40, 80 and 160 mM NaCl) over a period of 30 days. SP 81–3250 was more ...
DOI:
10.1016/j.envexpbot.2019.02.021

5. Growth and metabolic adjustments in response to gibberellin deficiency in drought stressed tomato plants

Author:
Omena-Garcia, Rebeca Patrícia; Oliveira Martins, Auxiliadora; Medeiros, David B.; Vallarino, José G.; Mendes Ribeiro, Dimas; Fernie, Alisdair R.; Araújo, Wagner L.; Nunes-Nesi, Adriano
Source:
Environmental and experimental botany 2019 v.159 pp. 95-107
ISSN:
0098-8472
Subject:
biomass; biosynthesis; carbon; gibberellins; leaf water potential; leaves; mutants; photosynthesis; proline; roots; shoots; tomatoes; turgor; water content; water deprivation; water use efficiency
Abstract:
... Gibberellins (GAs) have been shown to be involved in the tolerance of plants to a range of environmental stresses. However, the physiological and metabolic implications of altered levels of GAs in plants under drought stress remain largely unknown. To understand the contribution of GAs for the responses to water deficit conditions, physiological and metabolic parameters were evaluated in tomato de ...
DOI:
10.1016/j.envexpbot.2018.12.011