Morpho-histological analysis of tomato (Solanum lycopersicum L.) plants after treatment with juglone

Juglone is a substance that limits plant growth and has a toxic effect on plant development. In this study, we analyzed the influence of juglone at two different concentrations (10−3 M and 10−4 M), which were applied to different parts of Solanum lycopersicum L. plants (root system, stem after decapitation, and surface of a younger leaf or after autografting) for a short period of time (7 days), on the morphology and histology of stems. At a lower concentration, juglone had positive effects on plant growth, which resulted in an increase in interfascicular cambial cell divisions, faster development of a continuous cambium layer along the stem circumference, and development of fibers. Additionally, under the influence of juglone, the number of developing leaves increased and adventitious roots developed. The results are discussed based on the current literature concerning the reaction of plants to juglone and to stress conditions.

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Effects of Different Bacteria Applications on Tomato (Solanum lycopersicum L.) Plant Growth

Journal of the Institute of Science and Technology ◽

10.21597/jist.655657 ◽

2020 ◽

pp. 1507-1517

Author(s):

Badel UYSAL ŞAHİN ◽

Mesude Figen DÖNMEZ

Keyword(s):

Plant Growth ◽

Solanum Lycopersicum ◽

Solanum Lycopersicum L

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Effect of Plant Growth Regulators, Micro-Nutrients and Date of Transplanting on Growth and Yield of Tomato (Solanum lycopersicum L.)

Indian Journal of Pure & Applied Biosciences ◽

10.18782/2582-2845.8284 ◽

2020 ◽

Vol 8 (4) ◽

pp. 702-706

Author(s):

Pragya Ramgiry ◽

Keyword(s):

Plant Growth ◽

Solanum Lycopersicum ◽

Plant Growth Regulators ◽

Growth Regulators ◽

Growth And Yield ◽

Solanum Lycopersicum L

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Comparative Physiological and Biochemical Changes in Tomato (Solanum lycopersicum L.) Under Salt Stress and Recovery: Role of Antioxidant Defense and Glyoxalase Systems

Antioxidants ◽

10.3390/antiox8090350 ◽

2019 ◽

Vol 8 (9) ◽

pp. 350 ◽

Cited By ~ 10

Author(s):

Parvin ◽

Hasanuzzaman ◽

Bhuyan ◽

Nahar ◽

Mohsin ◽

...

Keyword(s):

Reactive Oxygen Species ◽

Plant Growth ◽

Solanum Lycopersicum ◽

Nutrient Solution ◽

Stress Responses ◽

Antioxidant Defense ◽

Oxygen Species ◽

Tomato Plants ◽

Solanum Lycopersicum L ◽

Post Stress

Salinity toxicity and the post-stress restorative process were examined to identify the salt tolerance mechanism in tomato, with a focus on the antioxidant defense and glyoxalase systems. Hydroponically grown 15 day-old tomato plants (Solanum lycopersicum L. cv. Pusa Ruby) were treated with 150 and 250 mM NaCl for 4 days and subsequently grown in nutrient solution for a further 2 days to observe the post-stress responses. Under saline conditions, plants showed osmotic stress responses that included low leaf relative water content and high proline content. Salinity induced oxidative stress by the over-accumulation of reactive oxygen species (H2O2 and O2•−) and methylglyoxal. Salinity also impaired the non-enzymatic and enzymatic components of the antioxidant defense system. On the other hand, excessive Na+ uptake induced ionic stress which resulted in a lower content of other minerals (K+, Ca2+, and Mg2+), and a reduction in photosynthetic pigment synthesis and plant growth. After 2 days in the normal nutrient solution, the plants showed improvements in antioxidant and glyoxalase system activities, followed by improvements in plant growth, water balance, and chlorophyll synthesis. The antioxidant and glyoxalase systems worked in concert to scavenge toxic reactive oxygen species (ROS), thereby reducing lipid peroxidation and membrane damage. Taken together, these findings indicate that tomato plants can tolerate salinity and show rapid post-stress recovery by enhancement of their antioxidant defense and glyoxalase systems.

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