How does chilling injury damage the plant in physiology?
How does chilling injury damage the plant in physiology?
In both cases, ice crystals form in water-filled plant tissues, dehydrating cells and disrupting membranes. The result is collapsed and/or darkened plant parts.
What is the impact of low temperature chilling freezing on plant?
Chilling and freezing interfere with both photosynthetic and non-photosynthetic processes in the cell. Chilling injury leads to reduced crop yields in the field and compromised quality of harvested products during storage and handling. Freezing injury can result in plant death and unmarketable product.
Why is chilling injury important?
Premature leaf senescence and sterility may also result from prolonged chilling. Perhaps the most important effect of prolonged chilling is the impairment of the cells’ ability to repair the chill-induced damage on return to the warmth, so that productivity will remain depressed.
What are chilling-sensitive plants?
chilling-sensitive plant A plant that is badly injured or killed by temperatures above freezing point, up to about 20°C.
How does chilling injury happen?
Chilling injury occurs at temperatures well above freezing point. The tissue becomes weakened leading to cellular dysfunctions. Symptoms include surface lesions/pitting, internal discoloration, water soaking of the tissue, failure to ripen normally and increased susceptibility to decay organisms such as Alternaria.
What is the difference between chilling and freezing injury?
What are the differences between freezing injury and chilling injury? Both are low temperature injuries, but for freeze damage to occur, the product must be below its freezing point. Chilling injury occurs at a range of temperatures that are low but nonfreezing for that product.
What are the symptoms of chilling injury?
Chilling injury symptoms vary depending on the commodity but often include surface discoloration, surface pitting, water soaked areas, lack of ability to ripen in fruits, and increased decay, among others.
How do you overcome a chilling injury?
In addition hot water dip treatments, intermittent warming, and rinsing and brushing at temperatures of 60 oC for a few seconds have been also reported to be effective at reducing the symptoms of chilling injury.
Why chilling injury can occur in vegetables product?
Chilling injury is what happens to some vegetable crops of tropical origin held at the wrong storage or transit temperature, but a temperature above 32°F (0°C). Chilling injury occurs at temperatures well above freezing point. The tissue becomes weakened leading to cellular dysfunctions.
How will you minimize chilling injury?
Which of the following crops are chilling sensitive?
In chilling-sensitive plants, the critical threshold temperature may vary with stage of development. For example, in avocados, papayas, honeydew melons, tomatoes, and mangos, the less mature fruits are usually more sensitive to chilling than the more mature fruits (2, 49-51).
Which of the following is a chill tolerant plant?
Miscanthus × giganteus, the most commonly planted miscanthus type, has been reported to be more chilling tolerant than other phylogenetically related C4 species such as maize (Zea mays), sorghum (Sorghum bicolor) or sugarcane (Saccharum officinarum) (Long and Spence, 2013; Sage et al., 2015).
What is the effect of chilling on plant cells?
Chilling temperatures (1-10°C) lead to numerous physiological disturbances in the cells of chilling-sensitive plants and result in chilling injury and death of tropical and subtropical plants, e.g., many vegetable species. The literature review shows that the exposure of chilling-sensitive plants…
What happens to plants when they are exposed to cold?
The literature review shows that the exposure of chilling-sensitive plants to low temperatures causes disturbances in all physiological processes – water regime, mineral nutrition, photosynthesis, respiration and metabolism.
How do plants respond to low temperature stress?
A diversity in plant responses to low temperature stress exists, including alterations in ethylene biosynthesis, increased respiration rates, cessation of protoplasmic streaming, increased solute leakage, and uncoupling of oxidative phosphorylation.
What are the signs and symptoms of plant disease?
These various responses ultimately give rise to an array of visual symptoms (e.g., surface pitting, water rot, poor color development, general loss of structural integrity) which can render severe losses in product quality both pre- and postharvest.
