09- Give reason of the following-
a) Apple tree loses all it's leaves in water.
b) Insectivorous plants trap insects.
Answers
a) Apple tree loses all it's leaves in water! Why?
Ans: When water demand of a fruit tree is higher than supply, drought stress occurs. Drought stress causes wilting, yellowing of the leaves, advanced leaf fall, and premature fruit ripening or fruit drop. Often, drought stress is associated with heat stress during the hot summer months.
b) Insectivorous plants trap insects.! Why?
Ans: Insectivorous plants mainly grow in humid wildernesses and bogs where plenty of sunlight and moisture can be found. However, since nutrients are scarce in the soil, they capture insects to supplement the nutrients that they tend to lack.
Answer:
a) ♠️When water demand of a fruit tree is higher than supply, drought stress occurs. Drought stress causes wilting, yellowing of the leaves, advanced leaf fall, and premature fruit ripening or fruit drop. Often, drought stress is associated with heat stress during the hot summer months. When drought stress and heat stress coincide, scorching of the leaves occurs in addition to the symptoms mentioned previously. When leaves are scorched, their edges dry out, and the leaves turn brown.Excess water (water stress or flooding) is just as damaging as not enough water.
a) ♠️When water demand of a fruit tree is higher than supply, drought stress occurs. Drought stress causes wilting, yellowing of the leaves, advanced leaf fall, and premature fruit ripening or fruit drop. Often, drought stress is associated with heat stress during the hot summer months. When drought stress and heat stress coincide, scorching of the leaves occurs in addition to the symptoms mentioned previously. When leaves are scorched, their edges dry out, and the leaves turn brown.Excess water (water stress or flooding) is just as damaging as not enough water. 2). Excess soil moisture excludes oxygen from the soil, resulting in severe injury to the root system. Tree roots in waterlogged soils stop growing, minerals are not absorbed, leaves turn yellow and remain small, and finally roots begin to die. The yellowing of leaves generally starts on the lower part of the tree on the inside of the crown and then moves outward. Premature fruit ripening and significant decrease in fruit quality is characteristic for trees in water-saturated soils. Besides this primary damage to the tree and fruits, the root system becomes more susceptible to infections of phytopathogen microorganisms in “wet-feet” conditions. Often, apple trees in poorly drained areas are infected by Phytophthora root and crown rot, slowly declining over one or more years.
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b) ♠️Insectivorous plants trap insects because they grow in soil which is usually thin and is also poor in nutrients, so they eat insects to fulfil their nutrient requirement. Insectivorous plants mainly grow in humid wildernesses and bogs where plenty of sunlight and moisture can be found. However, since nutrients are scarce in the soil, they capture insects to supplement the nutrients that they tend to lack.