Impact of Climate Change on Cucurbitaceous Vegetables in Relation to Increasing Temperature and Drought

Kumar, Randhir; Reddy, K. M.

doi:10.1007/978-3-030-63497-1_9

Cited by 9 publications

(8 citation statements)

References 36 publications

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“…In our experiment, we could observe the reduction, which was due to floral abortion, loss of stigmatic receptivity, and flower drop. Similar findings were reported in potato ( Rykaczewska, 2017 ) and cucurbits ( Kumar and Reddy, 2021 ). However, applying melatonin as a foliar spray led to notable improvements through increased numbers of fruits and overall fruit yield, which may be attributed due to enhanced photosynthate translocation from the source to the sink.…”

Section: Discussionsupporting

confidence: 89%

Melatonin imparts tolerance to combined drought and high-temperature stresses in tomato through osmotic adjustment and ABA accumulation

Mumithrakamatchi,

Alagarswamy,

Anitha

et al. 2024

Front. Plant Sci.

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In recent years, environmental stresses viz., drought and high-temperature negatively impacts the tomato growth, yield and quality. The effects of combined drought and high-temperature (HT) stresses during the flowering stage were investigated. The main objective was to assess the effects of foliar spray of melatonin under both individual and combined drought and HT stresses at the flowering stage. Drought stress was imposed by withholding irrigation, whereas HT stress was imposed by exposing the plants to an ambient temperature (AT)+5°C temperature. The drought+HT stress was imposed by exposing the plants to drought first, followed by exposure to AT+5°C temperature. The duration of individual and combined drought or HT stress was 10 days. The results showed that drought+HT stress had a significant negative effect compared with individual drought or HT stress alone. However, spraying 100 µM melatonin on the plants challenged with individual or combined drought and HT stress showed a significant increase in total chlorophyll content [drought: 16%, HT: 14%, and drought+HT: 11%], Fv/Fm [drought: 16%, HT: 15%, and drought+HT: 13%], relative water content [drought: 10%, HT: 2%, and drought+HT: 8%], and proline [drought: 26%, HT: 17%, and drought+HT: 14%] compared with their respective stress control. Additionally, melatonin positively influenced the stomatal and trichome characteristics compared with stress control plants. Also, the osmotic adjustment was found to be significantly increased in the melatonin-sprayed plants, which, in turn, resulted in an increased number of fruits, fruit set percentage, and fruit yield. Moreover, melatonin spray also enhanced the quality of fruits through increased lycopene content, carotenoid content, titratable acidity, and ascorbic acid content, compared with the stress control. Overall, this study highlights the usefulness of melatonin in effectively mitigating the negative effects of drought, HT, and drought+HT stress, thus leading to an increased drought and HT stress tolerance in tomato.

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Section: Discussionsupporting

confidence: 89%

Melatonin imparts tolerance to combined drought and high-temperature stresses in tomato through osmotic adjustment and ABA accumulation

Mumithrakamatchi,

Alagarswamy,

Anitha

et al. 2024

Front. Plant Sci.

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“…All cucurbit flowers per management practice were more frequently visited by pollinators during May – June season in the plateau zone compared to the rest. In the mountainous zone and during October –November, pollinator abundance had low number because of the presence of few flowers compared to the plateau zone [ 34 ], this translated to fewer visits. Pollinator abundance and visitation frequency to flowers are influenced by weather conditions [ 35 – 37 ] and the presence of floral resources [ 38 – 40 ].…”

Section: Discussionmentioning

confidence: 99%

Impact of cucurbit crop management techniques on the foraging behavior of honeybees and hoverflies in Morogoro, Tanzania

Rweyemamu,

Mwatawala,

Tryphone

et al. 2024

BMC Ecol Evo

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Background Poor agricultural practices have drastically threatened insect pollinators’ biodiversity. Little is known in Tanzania about how different agricultural practices affect pollinators’ foraging behavior. This study investigated the effects of the agroecological zone, season, cucurbit species and management practices on visitation frequency, visitation rate and time spent on cucurbit flowers by five pollinator species viz. Apis mellifera, Eristalinus megacephalus, Mesembrius caffer, Paragus borbonicus and Toxomerus floralis. The experiment was designed as a 5 × 3 × 3 × 2 × 2 factorial arrangement in a Randomized Complete Block Design (RCBD) with four replications. GAMOUR-Agroecology was tested against conventional practices and untreated control. Results This study revealed significant effects of agroecological zone × season × cucurbit species × management practice on pollinators’ visitation frequency (p = 0.007) and time spent on flowers (p = 0.005). Also, agroecological zone × season × cucurbit species × pollinator species significantly (p < 0.0001) affected pollinators’ visitation frequency. Agroecological zones × season × cucurbit species × cucurbits management practices × pollinators significantly (p = 0.001) affected pollinators’ visitation rate. Apis mellifera was the most frequent visitor in Cucurbita moschata plots treated with GAMOUR- Agroecology in the plateau zone, also, visited higher number of Cucumis sativus plots under GAMOUR-Agroecology practices in the mountainous zone during the October–November season. Furthermore, it has been found that pollinators spent much in cucurbit flowers on plots with GAMOUR-Agroecology practices and control. Conclusions Pollinators’ foraging behavior were enhanced by GAMOUR-Agroecology practices. Therefore, this study recommended that cucurbit growers should consider management practices that positively influence pollinator foraging activities for sustainable cucurbit production.

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“…Most of the cucurbits are perishable and very sensitive to unpredictable climatic changes. Environmental stress, such as increasing (high) temperature, is thought to be one of the major limiting factors in enhancing Cucurbitaceous vegetable productivity [ 43 ]. Additionally, the maize reported a reduction of up to 43.31% of the yield parameter.…”

Section: Discussionmentioning

confidence: 99%

“…During the experiment, the squash plants used to abort their flowers due to the consequences of the warming effect. That explains the loss of the yield for the squash plants, and it is reported that high temperature is thought to be one of the major limiting factors in enhancing Cucurbitaceous vegetable productivity [ 43 ].…”

Section: Discussionmentioning

confidence: 99%

Maize Intercropping in the Traditional “Milpa” System. Physiological, Morphological, and Agronomical Parameters under Induced Warming: Evidence of related Effect of Climate Change in San Luis Potosí (Mexico)

Diédhiou

Ramírez-Tobías

Fortanelli-Martínez

et al. 2022

Life

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Warmer temperatures predicted as a result of climate change will have an impact on milpa. An experiment was carried out with induced passive heat with the objective of simulating the increase in temperature on the physiological, morphological, and yield parameters of milpa from different climates of San Luis Potosí, Mexico. Two different environments, Open-top chambers (OTC) and control, and three milpas, from warm–dry, temperate, and hot and humid climates, were studied. A total of 12 experimental units of 13.13 m2 were used in the random design, with a factorial arrangement of 2 × 3 and two replications. Abiotic variables (minimum, maximum, and mean daily temperatures and accumulated heat units) were determined and compared between the two environments and confirmed that the OTC increased the abiotic variables. The growth and development parameters increased under the warming effect. Furthermore, the milpa from hot and humid climate was the least affected. In contrast, the warming considerably delayed yield parameters. The squash suffered the most, while the bean benefited the most. The warming affected the chlorophyll fluorescence and gas exchange differently for each crop. However, at an early stage, the maximum photochemical efficiency (Fv/Fm) and non-photochemical quenching (qN) for bean and maize were reduced, while at a late stage, they were Fv/Fm, photochemical quenching (qP), and qN for maize; stomatal conductance and transpiration rate of the squash were improved under the warming treatments. In conclusion, the warming delayed the yield and photosynthetic parameters, while growth and development benefited. The milpa systems were differently affected by warming.

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Impact of Climate Change on Cucurbitaceous Vegetables in Relation to Increasing Temperature and Drought

Cited by 9 publications

References 36 publications

Melatonin imparts tolerance to combined drought and high-temperature stresses in tomato through osmotic adjustment and ABA accumulation

Melatonin imparts tolerance to combined drought and high-temperature stresses in tomato through osmotic adjustment and ABA accumulation

Impact of cucurbit crop management techniques on the foraging behavior of honeybees and hoverflies in Morogoro, Tanzania

Maize Intercropping in the Traditional “Milpa” System. Physiological, Morphological, and Agronomical Parameters under Induced Warming: Evidence of related Effect of Climate Change in San Luis Potosí (Mexico)

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