Mitigation of adverse effects of salt stress on germination, growth, photosynthetic efficiency and yield in maize (Zea mays L.) through magnetopriming

• Autorzy: Baghel L. , Kataria S. , Jain M.

Warianty tytułu

PL

Łagodzenie niekorzystnego wpływu stresu solnego na kiełkowanie, wzrost, wydajność fotosyntetyczną oraz plon kukurydzy (Zea mays L.) poprzez magnetyczną stymulację nasion

• Języki publikacji: EN

Abstrakty

EN

The efficiency of magnetopriming was evaluated for mitigation of the detrimental effects of salt stress on maize germination, growth, photosynthesis, and yield of maize plants. Maize seeds were pretreated with 200 mT of static magnetic field (SMF) for 1 h to assess the impact of SMF on the germination, seedling vigor, growth of plant, photosynthetic performance, ROS content, and yield under salt stress. The seedling characteristics of maize were negatively influenced by salt stress. However, SMF-pretreated maize seeds showed relatively higher germination percentage and germination stress tolerance index as compared to untreated seeds in saline and nonsaline conditions. The detrimental effect of NaCl induced salt stress was also observed on growth, yield, and different physiological characteristic of maize plants. The results showed that SMF-pretreated seeds enhanced seedling vigor, growth parameters such as plant height, leaf area, and biomass accumulation at different concentrations of NaCl (0, 25, 50, 75, and 100 mM) as compared to untreated seeds. Photosynthetic pigments, quantum yield of PSII photochemistry (Fv/Fm), phenomenological fluxes such as electron transport per leaf CS (ETo/CSm) and density of reaction centers (RC/CSm), the performance index (PI) were high in the leaves of plants that emerged from SMF-pretreated seeds as compared to untreated seeds. This stimulatory effect of SMF treatment of seeds was also revealed in the rate of photosynthesis and stomatal conductance, which results in improved yield of maize plants under saline conditions. The leaves from plants of SMF-treated seeds showed decreased hydrogen peroxide (H2O2) when compared with untreated seeds in both conditions. SMF ameliorates the adverse effect of salt stress in maize plants, by reducing H2O2 and increasing growth, photosynthetic performance, and yield under salt stress. For improvement of salt tolerance, magnetopriming with SMF of 200 mT for 1 h to dry seeds of maize can be efficiently used as a presowing treatment.

PL

W doświadczeniu oceniono efektywność magnetycznej stymulacji nasion w celu łagodzenia szkodliwego wpływu zasolenia na kiełkowanie, wzrost, fotosyntezę i plonowanie kukurydzy (Zea mays L.). Nasiona kukurydzy wstępnie traktowano 200 mT statycznym polem magnetycznym (SMF) przez 1 godzinę w celu oceny jego wpływu na kiełkowanie, żywotność siewek, wzrost roślin, wydajność fotosyntetyczną, zawartość ROS i plonowanie w warunkach zasolenia. Zaobserwowano negatywny wpływ stresu solnego na badane cechy siewek kukurydzy. Nasiona wstępnie traktowane SMF charakteryzował stosunkowo wyższy procent kiełkowania i wskaźnik tolerancji na stres podczas kiełkowania w porównaniu z nasionami nietraktowanymi SMF, zarówno w warunkach zasolenia jak i jego braku. Szkodliwy wpływ indukowanego NaCl stresu solnego stwierdzono również w odniesieniu do wzrostu, plonowania oraz różnych parametrów fizjologicznych roślin kukurydzy. Wyniki wskazują, że traktowanie nasion SMF wpływało na zwiększoną żywotność siewek oraz parametrów wzrostu roślin, takich jak wysokość, powierzchnia liści i biomasa w warunkach zróżnicowanego zasolenia (0, 25, 50, 75 i 100 mM NaCl) w porównaniu z roślinami uzyskanymi z nasion nietraktowanych SMF. Zawartość barwników fotosyntetycznych, maksy-malna wydajność kwantowa fotosystemu PSII (Fv/Fm), fenomenologiczne przepływy energii, takie jak transport elektronów we wzbudzonej powierzchni fotosyntetycznej liścia CS (ETo/CSm) oraz gęstość centrów reakcji (RC/CSm); wskaźnik witalności (PI) był wyższy w roślinach uzyskanych z nasion wstępnie traktowanych SMF w porównaniu z nasionami niepoddanymi jego działaniu. Zastosowanie SMF wywierało stymulujący wpływ także na natężenie fotosyntezy oraz przewodnictwo szparkowe, co skutkowało wyższym plonowaniem roślin kukurydzy w warunkach zasolenia. Liście roślin pochodzących z nasion traktowanych SMF charakteryzował obniżony poziom nadtlenku wodoru (H2O2) w porównaniu z nasionami nietraktowanymi, zarówno w warunkach zasolenia jak i jego braku. SMF łagodzi niekorzystny wpływ stresu solnego na rośliny kukurydzy redukując poziom H2O2 oraz wpływając korzystnie na wzrost, wydajność fotosyntetyczną i plonowanie w warunkach stresu solnego. Magnetyczna stymulacja suchych nasion kukurydzy może być skutecznie stosowana jako metoda ich przedsiewnej obróbki w celu zwiększenia tolerancji roślin na zasolenie.

• Wydawca: -
• Czasopismo: Acta Agrobotanica
• Rocznik: 2019
• Tom: 72
• Numer: 1
• Opis fizyczny: Article: [16 p.], fig.,ref.

Twórcy

autor

Baghel L.

• Government College of Umarvan, Dhar, Madhya Pradesh, India

autor

Kataria S.

• School of Biochemistry, Devi Ahilya Vishwavidhayala, Khandwa Road, Indore, Madhya Pradesh, India

autor

Jain M.

• School of Biochemistry, Devi Ahilya Vishwavidhayala, Khandwa Road, Indore, Madhya Pradesh, India

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Identyfikatory

DOI

10.5586/aa.1757