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Morphological trait and biochemical effect on seed desiccation tolerance / Mohamad Azril Hafis Mohamad Nasir

Seed desiccation is referring to drying process or removing water from the seed. This process carries various benefits to humankind such as for future storage, genetic preservation, seed bank production and to minimize usage of space. The seed response towards desiccation process is classified into...

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Main Author: Mohamad Nasir, Mohamad Azril Hafis
Format: Student Project
Language:English
Published: 2019
Subjects:
S Agriculture (General)
Biochemical engineering. Bioprocess engineering
Online Access:https://ir.uitm.edu.my/id/eprint/72645/1/72645.pdf
https://ir.uitm.edu.my/id/eprint/72645/
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spelling my.uitm.ir.726452023-03-30T07:47:27Z https://ir.uitm.edu.my/id/eprint/72645/ Morphological trait and biochemical effect on seed desiccation tolerance / Mohamad Azril Hafis Mohamad Nasir Mohamad Nasir, Mohamad Azril Hafis S Agriculture (General) Biochemical engineering. Bioprocess engineering Seed desiccation is referring to drying process or removing water from the seed. This process carries various benefits to humankind such as for future storage, genetic preservation, seed bank production and to minimize usage of space. The seed response towards desiccation process is classified into three types based on storage behavior. They are the recalcitrant, orthodox and intermediate seeds. Morphological (seed size, seed coat ratio and seed being in juicy and fleshy fruit etc.) and ecological (origin of seed) factors are of significant importance in influencing the survival rate of seed during desiccation. Besides, seed physiology also plays a role in its desiccation tolerance. Seed that naturally survives desiccation is orthodox seed whereby it undergoes maturation drying that causes vacuole volume reduced followed by metabolic shutdown and sometimes, de-differentiation also happens. This situation causes oxidative stress due to imbalance between reactive oxygen species (ROS) and antioxidant enzyme but the amount of sugar and protein in the desiccating seed is able to act as a protective mechanism to prevent damage of the seed. This mechanism is trigged by water stress that naturally happens in the orthodox seed. The amount of antioxidant is also found at high levels in some orthodox seeds. Unlike orthodox seed, recalcitrant seed is developed and shed at high moisture content which makes it remain metabolically active. This seed also does not undergo maturation drying at the end of seed development. Thus, it becomes sensitive to the postharvest desiccation. Recalcitrant seed also has some amount of sugars and proteins but they cannot act as a protective mechanism. Intermediate seed is a seed that is more tolerant to desiccation than recalcitrant but not at lower temperature and extreme desiccation levels. In other word, intermediate seed has characteristics in between orthodox seed and recalcitrant seed. 2019 Student Project NonPeerReviewed text en https://ir.uitm.edu.my/id/eprint/72645/1/72645.pdf Morphological trait and biochemical effect on seed desiccation tolerance / Mohamad Azril Hafis Mohamad Nasir. (2019) [Student Project] <http://terminalib.uitm.edu.my/72645.pdf> (Submitted)
institution Universiti Teknologi Mara
building Tun Abdul Razak Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Mara
content_source UiTM Institutional Repository
url_provider http://ir.uitm.edu.my/
language English
topic S Agriculture (General)
Biochemical engineering. Bioprocess engineering
spellingShingle S Agriculture (General)
Biochemical engineering. Bioprocess engineering
Mohamad Nasir, Mohamad Azril Hafis
Morphological trait and biochemical effect on seed desiccation tolerance / Mohamad Azril Hafis Mohamad Nasir
description Seed desiccation is referring to drying process or removing water from the seed. This process carries various benefits to humankind such as for future storage, genetic preservation, seed bank production and to minimize usage of space. The seed response towards desiccation process is classified into three types based on storage behavior. They are the recalcitrant, orthodox and intermediate seeds. Morphological (seed size, seed coat ratio and seed being in juicy and fleshy fruit etc.) and ecological (origin of seed) factors are of significant importance in influencing the survival rate of seed during desiccation. Besides, seed physiology also plays a role in its desiccation tolerance. Seed that naturally survives desiccation is orthodox seed whereby it undergoes maturation drying that causes vacuole volume reduced followed by metabolic shutdown and sometimes, de-differentiation also happens. This situation causes oxidative stress due to imbalance between reactive oxygen species (ROS) and antioxidant enzyme but the amount of sugar and protein in the desiccating seed is able to act as a protective mechanism to prevent damage of the seed. This mechanism is trigged by water stress that naturally happens in the orthodox seed. The amount of antioxidant is also found at high levels in some orthodox seeds. Unlike orthodox seed, recalcitrant seed is developed and shed at high moisture content which makes it remain metabolically active. This seed also does not undergo maturation drying at the end of seed development. Thus, it becomes sensitive to the postharvest desiccation. Recalcitrant seed also has some amount of sugars and proteins but they cannot act as a protective mechanism. Intermediate seed is a seed that is more tolerant to desiccation than recalcitrant but not at lower temperature and extreme desiccation levels. In other word, intermediate seed has characteristics in between orthodox seed and recalcitrant seed.
format Student Project
author Mohamad Nasir, Mohamad Azril Hafis
author_facet Mohamad Nasir, Mohamad Azril Hafis
author_sort Mohamad Nasir, Mohamad Azril Hafis
title Morphological trait and biochemical effect on seed desiccation tolerance / Mohamad Azril Hafis Mohamad Nasir
title_short Morphological trait and biochemical effect on seed desiccation tolerance / Mohamad Azril Hafis Mohamad Nasir
title_full Morphological trait and biochemical effect on seed desiccation tolerance / Mohamad Azril Hafis Mohamad Nasir
title_fullStr Morphological trait and biochemical effect on seed desiccation tolerance / Mohamad Azril Hafis Mohamad Nasir
title_full_unstemmed Morphological trait and biochemical effect on seed desiccation tolerance / Mohamad Azril Hafis Mohamad Nasir
title_sort morphological trait and biochemical effect on seed desiccation tolerance / mohamad azril hafis mohamad nasir
publishDate 2019
url https://ir.uitm.edu.my/id/eprint/72645/1/72645.pdf
https://ir.uitm.edu.my/id/eprint/72645/
_version_ 1762396026924171264
score 13.211869

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