Effects of nanosilicon dioxide on leaf anatomy, chlorophyll fluorescence, and mineral element composition of strawberry under salinity stress

We investigated the effects of low pH on the photosynthesis, chlorophyll fluorescence, and mineral contents of the leaves of ginger plants under salt stress. This experiment involved four treatments: T1 (pH 6, 0 salinity), T2 (pH 4, 0 salinity), T3 (pH 6, 100 mmol L−1 salinity) and T4 (pH 4, 100 mmol L−1 salinity). This study showed that photosynthesis (Pn, Gs, WUE and Tr) and chlorophyll fluorescence (qP, Φ PSII, and Fv/Fm) significantly decreased under salt stress; however, all the parameters of the ginger plants under the low-pH treatment and salt stress recovered. Moreover, low pH reduced the content of Na and enhanced the contents of K, Mg, Fe and Zn in the leaves of ginger plants under salt stress. Taken together, these results suggest that low pH improves photosynthesis efficiency and nutrient acquisition and reduces the absorption of Na, which could enhance the salt tolerance of ginger.

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Variation in mineral element composition of landrace taro (Colocasia esculenta) corms grown under dryland farming system in South Africa

Heliyon ◽

10.1016/j.heliyon.2021.e06727 ◽

2021 ◽

Vol 7 (4) ◽

pp. e06727

Author(s):

Abe Shegro Gerrano ◽

Isack Mathew ◽

Admire IT. Shayanowako ◽

Stephen Amoo ◽

John Jason Mellem ◽

...

Keyword(s):

South Africa ◽

Farming System ◽

Colocasia Esculenta ◽

Element Composition ◽

Mineral Element ◽

Dryland Farming

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The RESPONSE OF SUGARCANE GENOTYPES SUBJECTED TO SALINITY STRESS AT DIFFERENT GROWTH PHASES

Journal of Plant Stress Physiology ◽

10.25081/jpsp.2019.v5.5643 ◽

2019 ◽

pp. 28-33

Author(s):

C. Brindha, S. Vasantha, R. Arunkumar

Keyword(s):

Salt Stress ◽

Chlorophyll Fluorescence ◽

Salinity Stress ◽

Growth Stage ◽

Growth Phases ◽

Salt Treatment ◽

Sodium Potassium ◽

Yield Parameters ◽

Crop Cycle ◽

Yield Responses

A few commercial sugarcane genotypes were subjected to salinity stress at various growth phases of sugarcane to ascertain the critical growth stage for salinity stress and to assess the response of the genotypes. All the data were recorded and analysed during maturity phase. The salt treatments drastically reduced SPAD chlorophyll, chlorophyll fluorescence, RWC, stalk height, weight and other yield parameters in a few genotypes during T2 (salt treatment given during formative phase) & T5 (salt treatment given throughout crop cycle) but a few genotypes which are tolerant towards salt stress gave better results comparing other genotypes. The ions like sodium, potassium and chloride were analysed in the juice which showed higher elevation in the genotype Co 97010. Among the genotypes, Co 85019 and Co 99004 recorded significantly prime compared to rest of the genotypes. Treatment throughout the growth phases (T5) followed by stress at formative phase (T2) were found to be critical for growth, physiological and yield responses in all the genotypes.

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